diff --git a/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.net6.0.cs b/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.net6.0.cs
index 64a18ef5c8736..c7a2e120a8fb1 100644
--- a/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.net6.0.cs
+++ b/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.net6.0.cs
@@ -125,14 +125,16 @@ public partial class AppConfigurationStore : Azure.Provisioning.Resource<Azure.R
     {
         public AppConfigurationStore(Azure.Provisioning.IConstruct scope, string name = "store", string version = "2023-03-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppConfiguration.AppConfigurationStoreData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppConfiguration.AppConfigurationStore FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.AppService
 {
     public partial class AppServicePlan : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.AppServicePlanData>
     {
-        public AppServicePlan(Azure.Provisioning.IConstruct scope, string resourceName, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.AppServicePlanData>)) { }
+        public AppServicePlan(Azure.Provisioning.IConstruct scope, string name, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.AppServicePlanData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppService.AppServicePlan FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
     public static partial class AppServicesExtensions
     {
@@ -140,20 +142,23 @@ public static partial class AppServicesExtensions
     }
     public partial class WebSite : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.WebSiteData>
     {
-        public WebSite(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.AppService.AppServicePlan appServicePlan, Azure.Provisioning.AppService.WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.WebSiteData>)) { }
+        public WebSite(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.AppServicePlan appServicePlan, Azure.Provisioning.AppService.WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.WebSiteData>)) { }
         public void AddApplicationSetting(string key, Azure.Provisioning.Parameter value) { }
         public void AddApplicationSetting(string key, string value) { }
         public void AddLogConfig(string resourceName) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppService.WebSite FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
     public partial class WebSiteConfigLogs : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.SiteLogsConfigData>
     {
-        public WebSiteConfigLogs(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.SiteLogsConfigData>)) { }
+        public WebSiteConfigLogs(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.SiteLogsConfigData>)) { }
+        public static Azure.Provisioning.AppService.WebSiteConfigLogs FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     public partial class WebSitePublishingCredentialPolicy : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>
     {
-        public WebSitePublishingCredentialPolicy(Azure.Provisioning.IConstruct scope, string resourceName, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>)) { }
+        public WebSitePublishingCredentialPolicy(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>)) { }
+        public static Azure.Provisioning.AppService.WebSitePublishingCredentialPolicy FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null) { throw null; }
     }
     public enum WebSiteRuntime
     {
@@ -213,6 +218,7 @@ public partial class KeyVaultSecret : Azure.Provisioning.Resource<Azure.Resource
         public KeyVaultSecret(Azure.Provisioning.IConstruct scope, Azure.Provisioning.KeyVaults.KeyVault? parent = null, string name = "kvs", string version = "2023-02-01") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.KeyVault.KeyVaultSecretData>)) { }
         public KeyVaultSecret(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ConnectionString connectionString, Azure.Provisioning.KeyVaults.KeyVault? parent = null, string version = "2023-02-01") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.KeyVault.KeyVaultSecretData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.KeyVaults.KeyVaultSecret FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.KeyVaults.KeyVault? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.PostgreSql
@@ -225,6 +231,7 @@ public partial class PostgreSqlFlexibleServer : Azure.Provisioning.Resource<Azur
     {
         public PostgreSqlFlexibleServer(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Parameter administratorLogin, Azure.Provisioning.Parameter administratorPassword, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerSku? sku = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerHighAvailability? highAvailability = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerStorage? storage = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerBackupProperties? backup = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerNetwork? network = null, string? availabilityZone = null, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "postgres", string version = "2020-06-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.PostgreSql.FlexibleServers.PostgreSqlFlexibleServerData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.PostgreSql.PostgreSqlFlexibleServer FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
         public Azure.Provisioning.PostgreSql.PostgreSqlConnectionString GetConnectionString(Azure.Provisioning.Parameter administratorLogin, Azure.Provisioning.Parameter administratorPassword) { throw null; }
     }
@@ -235,6 +242,7 @@ public partial class RedisCache : Azure.Provisioning.Resource<Azure.ResourceMana
     {
         public RedisCache(Azure.Provisioning.IConstruct scope, Azure.ResourceManager.Redis.Models.RedisSku? sku = null, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "redis", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Redis.RedisData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Redis.RedisCache FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
         public Azure.Provisioning.Redis.RedisCacheConnectionString GetConnectionString(bool useSecondary = false) { throw null; }
     }
@@ -275,6 +283,7 @@ public partial class DeploymentScript : Azure.Provisioning.Resource<Azure.Resour
         public DeploymentScript(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.Resource database, Azure.Provisioning.Parameter databaseServerName, Azure.Provisioning.Parameter appUserPasswordSecret, Azure.Provisioning.Parameter sqlAdminPasswordSecret, string version = "2020-10-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Resources.Models.AzureCliScript>)) { }
         public DeploymentScript(Azure.Provisioning.IConstruct scope, string resourceName, System.Collections.Generic.IEnumerable<Azure.ResourceManager.Resources.Models.ScriptEnvironmentVariable> scriptEnvironmentVariables, string scriptContent, string version = "2020-10-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Resources.Models.AzureCliScript>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Resources.DeploymentScript FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.Sql
@@ -283,6 +292,7 @@ public partial class SqlDatabase : Azure.Provisioning.Resource<Azure.ResourceMan
     {
         public SqlDatabase(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Sql.SqlServer? parent = null, string name = "db", string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlDatabaseData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlDatabase FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Sql.SqlServer? parent = null) { throw null; }
         public Azure.Provisioning.Sql.SqlDatabaseConnectionString GetConnectionString(Azure.Provisioning.Parameter passwordSecret, string userName = "appUser") { throw null; }
     }
     public partial class SqlDatabaseConnectionString : Azure.Provisioning.ConnectionString
@@ -293,11 +303,13 @@ public partial class SqlFirewallRule : Azure.Provisioning.Resource<Azure.Resourc
     {
         public SqlFirewallRule(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Sql.SqlServer? parent = null, string name = "fw", string version = "2020-11-01-preview") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlFirewallRuleData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlFirewallRule FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Sql.SqlServer? parent = null) { throw null; }
     }
     public partial class SqlServer : Azure.Provisioning.Resource<Azure.ResourceManager.Sql.SqlServerData>
     {
-        public SqlServer(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Parameter? adminLogin = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Parameter? adminPassword = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Sql.SqlServerAdministrator? administrator = default(Azure.Provisioning.Sql.SqlServerAdministrator?), string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlServerData>)) { }
+        public SqlServer(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, Azure.Provisioning.Parameter? adminLogin = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Parameter? adminPassword = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Sql.SqlServerAdministrator? administrator = default(Azure.Provisioning.Sql.SqlServerAdministrator?), string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlServerData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlServer FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
@@ -312,13 +324,15 @@ namespace Azure.Provisioning.Storage
 {
     public partial class BlobService : Azure.Provisioning.Resource<Azure.ResourceManager.Storage.BlobServiceData>
     {
-        public BlobService(Azure.Provisioning.IConstruct scope) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.BlobServiceData>)) { }
+        public BlobService(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Storage.StorageAccount? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.BlobServiceData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Storage.BlobService FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Storage.StorageAccount? parent = null) { throw null; }
     }
     public partial class StorageAccount : Azure.Provisioning.Resource<Azure.ResourceManager.Storage.StorageAccountData>
     {
         public StorageAccount(Azure.Provisioning.IConstruct scope, Azure.ResourceManager.Storage.Models.StorageKind kind, Azure.ResourceManager.Storage.Models.StorageSkuName sku, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "sa") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.StorageAccountData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Storage.StorageAccount FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     public static partial class StorageExtensions
diff --git a/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.netstandard2.0.cs b/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.netstandard2.0.cs
index 64a18ef5c8736..c7a2e120a8fb1 100644
--- a/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.netstandard2.0.cs
+++ b/sdk/provisioning/Azure.Provisioning/api/Azure.Provisioning.netstandard2.0.cs
@@ -125,14 +125,16 @@ public partial class AppConfigurationStore : Azure.Provisioning.Resource<Azure.R
     {
         public AppConfigurationStore(Azure.Provisioning.IConstruct scope, string name = "store", string version = "2023-03-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppConfiguration.AppConfigurationStoreData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppConfiguration.AppConfigurationStore FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.AppService
 {
     public partial class AppServicePlan : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.AppServicePlanData>
     {
-        public AppServicePlan(Azure.Provisioning.IConstruct scope, string resourceName, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.AppServicePlanData>)) { }
+        public AppServicePlan(Azure.Provisioning.IConstruct scope, string name, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.AppServicePlanData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppService.AppServicePlan FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
     public static partial class AppServicesExtensions
     {
@@ -140,20 +142,23 @@ public static partial class AppServicesExtensions
     }
     public partial class WebSite : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.WebSiteData>
     {
-        public WebSite(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.AppService.AppServicePlan appServicePlan, Azure.Provisioning.AppService.WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.WebSiteData>)) { }
+        public WebSite(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.AppServicePlan appServicePlan, Azure.Provisioning.AppService.WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?), Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.WebSiteData>)) { }
         public void AddApplicationSetting(string key, Azure.Provisioning.Parameter value) { }
         public void AddApplicationSetting(string key, string value) { }
         public void AddLogConfig(string resourceName) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.AppService.WebSite FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
     public partial class WebSiteConfigLogs : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.SiteLogsConfigData>
     {
-        public WebSiteConfigLogs(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.SiteLogsConfigData>)) { }
+        public WebSiteConfigLogs(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.SiteLogsConfigData>)) { }
+        public static Azure.Provisioning.AppService.WebSiteConfigLogs FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     public partial class WebSitePublishingCredentialPolicy : Azure.Provisioning.Resource<Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>
     {
-        public WebSitePublishingCredentialPolicy(Azure.Provisioning.IConstruct scope, string resourceName, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>)) { }
+        public WebSitePublishingCredentialPolicy(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null, string version = "2021-02-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.AppService.CsmPublishingCredentialsPoliciesEntityData>)) { }
+        public static Azure.Provisioning.AppService.WebSitePublishingCredentialPolicy FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.AppService.WebSite? parent = null) { throw null; }
     }
     public enum WebSiteRuntime
     {
@@ -213,6 +218,7 @@ public partial class KeyVaultSecret : Azure.Provisioning.Resource<Azure.Resource
         public KeyVaultSecret(Azure.Provisioning.IConstruct scope, Azure.Provisioning.KeyVaults.KeyVault? parent = null, string name = "kvs", string version = "2023-02-01") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.KeyVault.KeyVaultSecretData>)) { }
         public KeyVaultSecret(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ConnectionString connectionString, Azure.Provisioning.KeyVaults.KeyVault? parent = null, string version = "2023-02-01") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.KeyVault.KeyVaultSecretData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.KeyVaults.KeyVaultSecret FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.KeyVaults.KeyVault? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.PostgreSql
@@ -225,6 +231,7 @@ public partial class PostgreSqlFlexibleServer : Azure.Provisioning.Resource<Azur
     {
         public PostgreSqlFlexibleServer(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Parameter administratorLogin, Azure.Provisioning.Parameter administratorPassword, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerSku? sku = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerHighAvailability? highAvailability = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerStorage? storage = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerBackupProperties? backup = null, Azure.ResourceManager.PostgreSql.FlexibleServers.Models.PostgreSqlFlexibleServerNetwork? network = null, string? availabilityZone = null, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "postgres", string version = "2020-06-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.PostgreSql.FlexibleServers.PostgreSqlFlexibleServerData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.PostgreSql.PostgreSqlFlexibleServer FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
         public Azure.Provisioning.PostgreSql.PostgreSqlConnectionString GetConnectionString(Azure.Provisioning.Parameter administratorLogin, Azure.Provisioning.Parameter administratorPassword) { throw null; }
     }
@@ -235,6 +242,7 @@ public partial class RedisCache : Azure.Provisioning.Resource<Azure.ResourceMana
     {
         public RedisCache(Azure.Provisioning.IConstruct scope, Azure.ResourceManager.Redis.Models.RedisSku? sku = null, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "redis", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Redis.RedisData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Redis.RedisCache FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
         public Azure.Provisioning.Redis.RedisCacheConnectionString GetConnectionString(bool useSecondary = false) { throw null; }
     }
@@ -275,6 +283,7 @@ public partial class DeploymentScript : Azure.Provisioning.Resource<Azure.Resour
         public DeploymentScript(Azure.Provisioning.IConstruct scope, string resourceName, Azure.Provisioning.Resource database, Azure.Provisioning.Parameter databaseServerName, Azure.Provisioning.Parameter appUserPasswordSecret, Azure.Provisioning.Parameter sqlAdminPasswordSecret, string version = "2020-10-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Resources.Models.AzureCliScript>)) { }
         public DeploymentScript(Azure.Provisioning.IConstruct scope, string resourceName, System.Collections.Generic.IEnumerable<Azure.ResourceManager.Resources.Models.ScriptEnvironmentVariable> scriptEnvironmentVariables, string scriptContent, string version = "2020-10-01", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Resources.Models.AzureCliScript>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Resources.DeploymentScript FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
     }
 }
 namespace Azure.Provisioning.Sql
@@ -283,6 +292,7 @@ public partial class SqlDatabase : Azure.Provisioning.Resource<Azure.ResourceMan
     {
         public SqlDatabase(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Sql.SqlServer? parent = null, string name = "db", string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlDatabaseData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlDatabase FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Sql.SqlServer? parent = null) { throw null; }
         public Azure.Provisioning.Sql.SqlDatabaseConnectionString GetConnectionString(Azure.Provisioning.Parameter passwordSecret, string userName = "appUser") { throw null; }
     }
     public partial class SqlDatabaseConnectionString : Azure.Provisioning.ConnectionString
@@ -293,11 +303,13 @@ public partial class SqlFirewallRule : Azure.Provisioning.Resource<Azure.Resourc
     {
         public SqlFirewallRule(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Sql.SqlServer? parent = null, string name = "fw", string version = "2020-11-01-preview") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlFirewallRuleData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlFirewallRule FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Sql.SqlServer? parent = null) { throw null; }
     }
     public partial class SqlServer : Azure.Provisioning.Resource<Azure.ResourceManager.Sql.SqlServerData>
     {
-        public SqlServer(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Parameter? adminLogin = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Parameter? adminPassword = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Sql.SqlServerAdministrator? administrator = default(Azure.Provisioning.Sql.SqlServerAdministrator?), string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlServerData>)) { }
+        public SqlServer(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, Azure.Provisioning.Parameter? adminLogin = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Parameter? adminPassword = default(Azure.Provisioning.Parameter?), Azure.Provisioning.Sql.SqlServerAdministrator? administrator = default(Azure.Provisioning.Sql.SqlServerAdministrator?), string version = "2022-08-01-preview", Azure.Core.AzureLocation? location = default(Azure.Core.AzureLocation?)) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Sql.SqlServerData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Sql.SqlServer FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
@@ -312,13 +324,15 @@ namespace Azure.Provisioning.Storage
 {
     public partial class BlobService : Azure.Provisioning.Resource<Azure.ResourceManager.Storage.BlobServiceData>
     {
-        public BlobService(Azure.Provisioning.IConstruct scope) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.BlobServiceData>)) { }
+        public BlobService(Azure.Provisioning.IConstruct scope, Azure.Provisioning.Storage.StorageAccount? parent = null) : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.BlobServiceData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Storage.BlobService FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.Storage.StorageAccount? parent = null) { throw null; }
     }
     public partial class StorageAccount : Azure.Provisioning.Resource<Azure.ResourceManager.Storage.StorageAccountData>
     {
         public StorageAccount(Azure.Provisioning.IConstruct scope, Azure.ResourceManager.Storage.Models.StorageKind kind, Azure.ResourceManager.Storage.Models.StorageSkuName sku, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null, string name = "sa") : base (default(Azure.Provisioning.IConstruct), default(Azure.Provisioning.Resource), default(string), default(Azure.Core.ResourceType), default(string), default(System.Func<string, Azure.ResourceManager.Storage.StorageAccountData>)) { }
         protected override Azure.Provisioning.Resource? FindParentInScope(Azure.Provisioning.IConstruct scope) { throw null; }
+        public static Azure.Provisioning.Storage.StorageAccount FromExisting(Azure.Provisioning.IConstruct scope, string name, Azure.Provisioning.ResourceManager.ResourceGroup? parent = null) { throw null; }
         protected override string GetAzureName(Azure.Provisioning.IConstruct scope, string resourceName) { throw null; }
     }
     public static partial class StorageExtensions
diff --git a/sdk/provisioning/Azure.Provisioning/src/ModuleConstruct.cs b/sdk/provisioning/Azure.Provisioning/src/ModuleConstruct.cs
index 9a1863986598d..2477401d35d97 100644
--- a/sdk/provisioning/Azure.Provisioning/src/ModuleConstruct.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/ModuleConstruct.cs
@@ -147,7 +147,7 @@ private void WriteExistingResources(MemoryStream stream)
             {
                 stream.WriteLine();
                 stream.WriteLine($"resource {resource.Name} '{resource.Id.ResourceType}@{resource.Version}' existing = {{");
-                stream.WriteLine($"  name: '{resource.Id.Name}'");
+                stream.WriteLine($"  name: {resource.Id.Name}");
                 stream.WriteLine($"}}");
             }
         }
diff --git a/sdk/provisioning/Azure.Provisioning/src/appconfiguration/AppConfigurationStore.cs b/sdk/provisioning/Azure.Provisioning/src/appconfiguration/AppConfigurationStore.cs
index b657c4f039023..8b52da4625372 100644
--- a/sdk/provisioning/Azure.Provisioning/src/appconfiguration/AppConfigurationStore.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/appconfiguration/AppConfigurationStore.cs
@@ -15,6 +15,7 @@ namespace Azure.Provisioning.AppConfiguration
     public class AppConfigurationStore : Resource<AppConfigurationStoreData>
     {
         private const string ResourceTypeName = "Microsoft.AppConfiguration/configurationStores";
+        private static readonly Func<string, AppConfigurationStoreData> Empty = (name) => ArmAppConfigurationModelFactory.AppConfigurationStoreData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="AppConfigurationStore"/> class.
@@ -24,7 +25,7 @@ public class AppConfigurationStore : Resource<AppConfigurationStoreData>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
         public AppConfigurationStore(IConstruct scope, string name = "store", string version = "2023-03-01", AzureLocation? location = default)
-            : base(scope, null, name, ResourceTypeName, version, (name) => ArmAppConfigurationModelFactory.AppConfigurationStoreData(
+            : this(scope, name, version, location, null, false, (name) => ArmAppConfigurationModelFactory.AppConfigurationStoreData(
                 name: name,
                 resourceType: ResourceTypeName,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
@@ -33,6 +34,21 @@ public AppConfigurationStore(IConstruct scope, string name = "store", string ver
             AddOutput(store => store.Endpoint, $"{Name}_endpoint");
         }
 
+        private AppConfigurationStore(IConstruct scope, string name = "store", string version = "2023-03-01", AzureLocation? location = default, ResourceGroup? parent = null, bool isExisting = false, Func<string, AppConfigurationStoreData>? creator = null)
+            : base(scope, null, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="AppConfigurationStore"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static AppConfigurationStore FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new AppConfigurationStore(scope, name, parent: parent, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVault.cs b/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVault.cs
index cc6907af16418..8f923e1525800 100644
--- a/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVault.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVault.cs
@@ -16,9 +16,10 @@ namespace Azure.Provisioning.KeyVaults
     public class KeyVault : Resource<KeyVaultData>
     {
         private const string ResourceTypeName = "Microsoft.KeyVault/vaults";
+        private static readonly Func<string, KeyVaultData> Empty = (name) => ArmKeyVaultModelFactory.KeyVaultData();
 
         /// <summary>
-        /// Creates a new instance of the <see cref="KeyVault"/> class referencing an existing KeyVault.
+        /// Creates a new instance of the <see cref="KeyVault"/> class referencing an existing instance.
         /// </summary>
         /// <param name="scope">The scope.</param>
         /// <param name="name">The resource name.</param>
@@ -36,12 +37,7 @@ public static KeyVault FromExisting(IConstruct scope, string name, ResourceGroup
         /// <param name="location">The location.</param>
         /// <param name="parent"></param>
         public KeyVault(IConstruct scope, ResourceGroup? parent = default, string name = "kv", string version = "2023-02-01", AzureLocation? location = default)
-            : this(scope, parent, name, version, location, false)
-        {
-        }
-
-        private KeyVault(IConstruct scope, ResourceGroup? parent = default, string name = "kv", string version = "2023-02-01", AzureLocation? location = default, bool isExisting = false)
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmKeyVaultModelFactory.KeyVaultData(
+            : this(scope, parent, name, version, location, false, (name) => ArmKeyVaultModelFactory.KeyVaultData(
                 name: name,
                 resourceType: ResourceTypeName,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
@@ -58,20 +54,21 @@ private KeyVault(IConstruct scope, ResourceGroup? parent = default, string name
                             }
                         })
                     } : default,
-                    enableRbacAuthorization: true)),
-                isExisting: isExisting)
+                    enableRbacAuthorization: true)))
         {
-            if (!isExisting)
-            {
-                AssignProperty(data => data.Name, GetAzureName(scope, name));
+            AssignProperty(data => data.Name, GetAzureName(scope, name));
 
-                if (scope.Root.Properties.TenantId == Guid.Empty)
-                {
-                    AssignProperty(kv => kv.Properties.TenantId, Tenant.TenantIdExpression);
-                }
+            if (scope.Root.Properties.TenantId == Guid.Empty)
+            {
+                AssignProperty(kv => kv.Properties.TenantId, Tenant.TenantIdExpression);
             }
         }
 
+        private KeyVault(IConstruct scope, ResourceGroup? parent = default, string name = "kv", string version = "2023-02-01", AzureLocation? location = default, bool isExisting = false, Func<string, KeyVaultData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting: isExisting)
+        {
+        }
+
         /// <summary>
         /// Adds an access policy to the <see cref="KeyVault"/>.
         /// </summary>
diff --git a/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVaultSecret.cs b/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVaultSecret.cs
index 49906e5184de3..738ad5cac6fdf 100644
--- a/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVaultSecret.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/keyvault/KeyVaultSecret.cs
@@ -2,7 +2,6 @@
 // Licensed under the MIT License.
 
 using System;
-using Azure.Provisioning.Sql;
 using Azure.ResourceManager.KeyVault;
 using Azure.ResourceManager.KeyVault.Models;
 
@@ -14,6 +13,7 @@ namespace Azure.Provisioning.KeyVaults
     public class KeyVaultSecret : Resource<KeyVaultSecretData>
     {
         private const string ResourceTypeName = "Microsoft.KeyVault/vaults/secrets";
+        private static readonly Func<string, KeyVaultSecretData> Empty = (name) => ArmKeyVaultModelFactory.KeyVaultSecretData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="KeyVaultSecret"/>.
@@ -23,7 +23,7 @@ public class KeyVaultSecret : Resource<KeyVaultSecretData>
         /// <param name="name">The name.</param>
         /// <param name="version">The version.</param>
         public KeyVaultSecret(IConstruct scope, KeyVault? parent = null, string name = "kvs", string version = "2023-02-01")
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmKeyVaultModelFactory.KeyVaultSecretData(
+            : this(scope, parent, name, version, false, (name) => ArmKeyVaultModelFactory.KeyVaultSecretData(
                 name: name,
                 resourceType: ResourceTypeName,
                 properties: ArmKeyVaultModelFactory.SecretProperties(
@@ -32,6 +32,11 @@ public KeyVaultSecret(IConstruct scope, KeyVault? parent = null, string name = "
         {
         }
 
+        private KeyVaultSecret(IConstruct scope, KeyVault? parent = null, string name = "kvs", string version = "2023-02-01", bool isExisting = false, Func<string, KeyVaultSecretData>? createProperties = null)
+            : base(scope, parent, name, ResourceTypeName, version, createProperties ?? Empty, isExisting)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="KeyVaultSecret"/>.
         /// </summary>
@@ -41,7 +46,7 @@ public KeyVaultSecret(IConstruct scope, KeyVault? parent = null, string name = "
         /// <param name="connectionString">The connection string.</param>
         /// <param name="version">The version.</param>
         public KeyVaultSecret(IConstruct scope, string name, ConnectionString connectionString, KeyVault? parent = null, string version = "2023-02-01")
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmKeyVaultModelFactory.KeyVaultSecretData(
+            : this(scope, parent, name, version, false, (name) => ArmKeyVaultModelFactory.KeyVaultSecretData(
                 name: name,
                 resourceType: ResourceTypeName,
                 properties: ArmKeyVaultModelFactory.SecretProperties(
@@ -50,6 +55,16 @@ public KeyVaultSecret(IConstruct scope, string name, ConnectionString connection
         {
         }
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="KeyVaultSecret"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static KeyVaultSecret FromExisting(IConstruct scope, string name, KeyVault? parent = null)
+            => new KeyVaultSecret(scope, parent, name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/postgresql/PostgreSqlFlexibleServer.cs b/sdk/provisioning/Azure.Provisioning/src/postgresql/PostgreSqlFlexibleServer.cs
index 71e7f71c094cd..6d1a93d994b42 100644
--- a/sdk/provisioning/Azure.Provisioning/src/postgresql/PostgreSqlFlexibleServer.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/postgresql/PostgreSqlFlexibleServer.cs
@@ -5,11 +5,8 @@
 using Azure.Core;
 using Azure.Provisioning.Redis;
 using Azure.Provisioning.ResourceManager;
-using Azure.ResourceManager.PostgreSql;
 using Azure.ResourceManager.PostgreSql.FlexibleServers;
 using Azure.ResourceManager.PostgreSql.FlexibleServers.Models;
-using Azure.ResourceManager.PostgreSql.Models;
-using Azure.ResourceManager.Redis.Models;
 
 namespace Azure.Provisioning.PostgreSql
 {
@@ -19,6 +16,7 @@ namespace Azure.Provisioning.PostgreSql
     public class PostgreSqlFlexibleServer : Resource<PostgreSqlFlexibleServerData>
     {
         private const string ResourceTypeName = "Microsoft.DBforPostgreSQL/flexibleServers";
+        private static readonly Func<string, PostgreSqlFlexibleServerData> Empty = (name) => ArmPostgreSqlFlexibleServersModelFactory.PostgreSqlFlexibleServerData();
 
         /// <summary>
         /// Creates a new instance of the <see cref="PostgreSqlFlexibleServer"/> class.
@@ -50,7 +48,7 @@ public PostgreSqlFlexibleServer(
             string name = "postgres",
             string version = "2020-06-01",
             AzureLocation? location = default)
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmPostgreSqlFlexibleServersModelFactory.PostgreSqlFlexibleServerData(
+        : this(scope, administratorLogin, administratorPassword, sku, highAvailability, storage, backup, network, availabilityZone, parent, name, version, location, false, (name) => ArmPostgreSqlFlexibleServersModelFactory.PostgreSqlFlexibleServerData(
                 name: name,
                 sku: sku,
                 // create new instances so the properties can be overriden by user if needed
@@ -66,6 +64,26 @@ public PostgreSqlFlexibleServer(
             AssignProperty(data => data.AdministratorLoginPassword, administratorPassword);
         }
 
+        private PostgreSqlFlexibleServer(
+            IConstruct scope,
+            Parameter administratorLogin = default,
+            Parameter administratorPassword = default,
+            PostgreSqlFlexibleServerSku? sku = default,
+            PostgreSqlFlexibleServerHighAvailability? highAvailability = default,
+            PostgreSqlFlexibleServerStorage? storage = default,
+            PostgreSqlFlexibleServerBackupProperties? backup = default,
+            PostgreSqlFlexibleServerNetwork? network = default,
+            string? availabilityZone = default,
+            ResourceGroup? parent = default,
+            string name = "postgres",
+            string version = "2020-06-01",
+            AzureLocation? location = default,
+            bool isExisting = false,
+            Func<string, PostgreSqlFlexibleServerData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
@@ -77,6 +95,16 @@ public PostgreSqlFlexibleServer(
             return result;
         }
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="PostgreSqlFlexibleServer"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static PostgreSqlFlexibleServer FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new PostgreSqlFlexibleServer(scope, parent: parent, name: name, isExisting: true);
+
         /// <summary>
         /// Gets the connection string for the <see cref="RedisCache"/>.
         /// </summary>
diff --git a/sdk/provisioning/Azure.Provisioning/src/redis/RedisCache.cs b/sdk/provisioning/Azure.Provisioning/src/redis/RedisCache.cs
index 8368280927654..d15fe4d13fa16 100644
--- a/sdk/provisioning/Azure.Provisioning/src/redis/RedisCache.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/redis/RedisCache.cs
@@ -15,6 +15,7 @@ namespace Azure.Provisioning.Redis
     public class RedisCache : Resource<RedisData>
     {
         private const string ResourceTypeName = "Microsoft.Cache/Redis";
+        private static readonly Func<string, RedisData> Empty = (name) => ArmRedisModelFactory.RedisData(updateChannel: null);
 
         /// <summary>
         /// Creates a new instance of the <see cref="RedisCache"/> class.
@@ -25,7 +26,7 @@ public class RedisCache : Resource<RedisData>
         /// <param name="name"></param>
         /// <param name="location"></param>
         public RedisCache(IConstruct scope, RedisSku? sku = default, ResourceGroup? parent = default, string name = "redis", AzureLocation? location = default)
-            : base(scope, parent, name, ResourceTypeName, "2020-06-01", (name) => ArmRedisModelFactory.RedisData(
+            : this(scope, sku, parent, name, location, false, (name) => ArmRedisModelFactory.RedisData(
                 name: name,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
                 enableNonSslPort: false,
@@ -37,6 +38,11 @@ public RedisCache(IConstruct scope, RedisSku? sku = default, ResourceGroup? pare
             AssignProperty(data => data.Name, GetAzureName(scope, name));
         }
 
+        private RedisCache(IConstruct scope, RedisSku? sku = default, ResourceGroup? parent = default, string name = "redis", AzureLocation? location = default, bool isExisting = false, Func<string, RedisData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, "2020-06-01", creator ?? Empty, isExisting)
+        {
+        }
+
         /// <summary>
         /// Gets the connection string for the <see cref="RedisCache"/>.
         /// </summary>
@@ -54,6 +60,16 @@ public RedisCacheConnectionString GetConnectionString(bool useSecondary = false)
             return result;
         }
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="RedisCache"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static RedisCache FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new RedisCache(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override string GetAzureName(IConstruct scope, string resourceName) => GetGloballyUniqueName(resourceName);
     }
diff --git a/sdk/provisioning/Azure.Provisioning/src/resources/DeploymentScript.cs b/sdk/provisioning/Azure.Provisioning/src/resources/DeploymentScript.cs
index 52ff33e01656a..0e916c34c6652 100644
--- a/sdk/provisioning/Azure.Provisioning/src/resources/DeploymentScript.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/resources/DeploymentScript.cs
@@ -16,6 +16,7 @@ public class DeploymentScript : Resource<AzureCliScript>
     {
         private const string ResourceTypeName = "Microsoft.Resources/deploymentScripts";
         private const string _defaultVersion = "2020-10-01";
+        private static readonly Func<string, AzureCliScript> Empty = (name) => ArmResourcesModelFactory.AzureCliScript();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="DeploymentScript"/>.
@@ -36,7 +37,8 @@ public DeploymentScript(IConstruct scope, string resourceName, IEnumerable<Scrip
                 timeout: TimeSpan.FromMinutes(5),
                 cleanupPreference: ScriptCleanupOptions.OnSuccess,
                 environmentVariables: scriptEnvironmentVariables,
-                scriptContent: scriptContent))
+                scriptContent: scriptContent),
+                  false)
         {
         }
 
@@ -83,13 +85,29 @@ alter role db_owner add member ${APPUSERNAME}
                         SCRIPT_END
 
                         ./sqlcmd -S ${DBSERVER} -d ${DBNAME} -U ${SQLADMIN} -i ./initDb.sql
-                        """))
+                        """),
+                  false)
         {
             AssignProperty(data => data.EnvironmentVariables[0].SecureValue, appUserPasswordSecret);
             AssignProperty(data => data.EnvironmentVariables[1].SecureValue, sqlAdminPasswordSecret);
             AssignProperty(data => data.EnvironmentVariables[2].Value, databaseServerName);
         }
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="DeploymentScript"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static DeploymentScript FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new DeploymentScript(scope, parent: parent, name: name, isExisting: true);
+
+        private DeploymentScript(IConstruct scope, string name, ResourceGroup? parent = null, bool isExisting = false)
+            : base(scope, parent, name, ResourceTypeName, _defaultVersion, Empty, isExisting)
+        {
+        }
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlDatabase.cs b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlDatabase.cs
index 95bcaaa25aedd..e99b349bdf90a 100644
--- a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlDatabase.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlDatabase.cs
@@ -14,6 +14,7 @@ namespace Azure.Provisioning.Sql
     public class SqlDatabase : Resource<SqlDatabaseData>
     {
         private const string ResourceTypeName = "Microsoft.Sql/servers/databases";
+        private static readonly Func<string, SqlDatabaseData> Empty = (name) => ArmSqlModelFactory.SqlDatabaseData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="SqlDatabase"/>.
@@ -24,12 +25,17 @@ public class SqlDatabase : Resource<SqlDatabaseData>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
         public SqlDatabase(IConstruct scope, SqlServer? parent = null, string name = "db", string version = "2022-08-01-preview", AzureLocation? location = default)
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmSqlModelFactory.SqlDatabaseData(
+            : this(scope, parent, name, version, location, false, (name) => ArmSqlModelFactory.SqlDatabaseData(
                 name: name,
                 resourceType: ResourceTypeName))
         {
         }
 
+        private SqlDatabase(IConstruct scope, SqlServer? parent = null, string name = "db", string version = "2022-08-01-preview", AzureLocation? location = default, bool isExisting = false, Func<string, SqlDatabaseData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
         /// <summary>
         /// Gets the connection string for the <see cref="SqlDatabase"/>.
         /// </summary>
@@ -39,6 +45,16 @@ public SqlDatabase(IConstruct scope, SqlServer? parent = null, string name = "db
         public SqlDatabaseConnectionString GetConnectionString(Parameter passwordSecret, string userName = "appUser")
             => new SqlDatabaseConnectionString(this, passwordSecret, userName);
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="SqlDatabase"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static SqlDatabase FromExisting(IConstruct scope, string name, SqlServer? parent = null)
+            => new SqlDatabase(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlFirewallRule.cs b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlFirewallRule.cs
index 72ff35e46e777..103cc268f3f28 100644
--- a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlFirewallRule.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlFirewallRule.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using System;
 using Azure.ResourceManager.Sql;
 using Azure.ResourceManager.Sql.Models;
 
@@ -12,6 +13,7 @@ namespace Azure.Provisioning.Sql
     public class SqlFirewallRule : Resource<SqlFirewallRuleData>
     {
         private const string ResourceTypeName = "Microsoft.Sql/servers/firewallRules";
+        private static readonly Func<string, SqlFirewallRuleData> Empty = (name) => ArmSqlModelFactory.SqlFirewallRuleData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="SqlFirewallRule"/>.
@@ -21,7 +23,7 @@ public class SqlFirewallRule : Resource<SqlFirewallRuleData>
         /// <param name="name">The name.</param>
         /// <param name="version">The version.</param>
         public SqlFirewallRule(IConstruct scope, SqlServer? parent = default, string name = "fw", string version = "2020-11-01-preview")
-            : base(scope, parent, name, ResourceTypeName, version, (name) => ArmSqlModelFactory.SqlFirewallRuleData(
+            : this(scope, parent, name, version, false, (name) => ArmSqlModelFactory.SqlFirewallRuleData(
                 name: name,
                 resourceType: ResourceTypeName,
                 startIPAddress: "0.0.0.1",
@@ -30,6 +32,21 @@ public SqlFirewallRule(IConstruct scope, SqlServer? parent = default, string nam
         {
         }
 
+        private SqlFirewallRule(IConstruct scope, SqlServer? parent = default, string name = "fw", string version = "2020-11-01-preview", bool isExisting = false, Func<string, SqlFirewallRuleData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="SqlFirewallRule"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static SqlFirewallRule FromExisting(IConstruct scope, string name, SqlServer? parent = null)
+            => new SqlFirewallRule(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlServer.cs b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlServer.cs
index 635aec0420170..ca5474067ef60 100644
--- a/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlServer.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/sqlmanagement/SqlServer.cs
@@ -15,12 +15,14 @@ namespace Azure.Provisioning.Sql
     public class SqlServer : Resource<SqlServerData>
     {
         private const string ResourceTypeName = "Microsoft.Sql/servers";
+        private static readonly Func<string, SqlServerData> Empty = (name) => ArmSqlModelFactory.SqlServerData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="SqlServer"/> class for mocking.
         /// </summary>
         /// <param name="scope">The scope.</param>
         /// <param name="name">The name.</param>
+        /// <param name="parent">The parent.</param>
         /// <param name="adminLogin">The administrator login.</param>
         /// <param name="adminPassword">The administrator password.</param>
         /// <param name="administrator">The administrator when using Entra.</param>
@@ -29,12 +31,13 @@ public class SqlServer : Resource<SqlServerData>
         public SqlServer(
             IConstruct scope,
             string name,
+            ResourceGroup? parent = null,
             Parameter? adminLogin = default,
             Parameter? adminPassword = default,
             SqlServerAdministrator? administrator = default,
             string version = "2022-08-01-preview",
             AzureLocation? location = default)
-            : base(scope, null, name, ResourceTypeName, version, (name) => ArmSqlModelFactory.SqlServerData(
+            : this(scope, name, parent, adminLogin, adminPassword, administrator, version, location, false, (name) => ArmSqlModelFactory.SqlServerData(
                 name: name,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
                 resourceType: ResourceTypeName,
@@ -64,6 +67,31 @@ public SqlServer(
             }
         }
 
+        private SqlServer(
+            IConstruct scope,
+            string name,
+            ResourceGroup? parent = null,
+            Parameter? adminLogin = default,
+            Parameter? adminPassword = default,
+            SqlServerAdministrator? administrator = default,
+            string version = "2022-08-01-preview",
+            AzureLocation? location = default,
+            bool isExisting = false,
+            Func<string, SqlServerData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="SqlServer"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static SqlServer FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new SqlServer(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/storage/BlobService.cs b/sdk/provisioning/Azure.Provisioning/src/storage/BlobService.cs
index 75d1623a1bd6b..c907f46012d8a 100644
--- a/sdk/provisioning/Azure.Provisioning/src/storage/BlobService.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/storage/BlobService.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using System;
 using Azure.ResourceManager.Storage;
 using Azure.ResourceManager.Storage.Models;
 
@@ -12,18 +13,35 @@ namespace Azure.Provisioning.Storage
     public class BlobService : Resource<BlobServiceData>
     {
         private const string ResourceTypeName = "Microsoft.Storage/storageAccounts/blobServices";
+        private static readonly Func<string, BlobServiceData> Empty = (name) => ArmStorageModelFactory.BlobServiceData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="BlobService"/>.
         /// </summary>
         /// <param name="scope">The scope.</param>
-        public BlobService(IConstruct scope)
-            : base(scope, null, "default", ResourceTypeName, "2022-09-01", (name) => ArmStorageModelFactory.BlobServiceData(
-                name: "default",
+        /// <param name="parent">The parent.</param>
+        public BlobService(IConstruct scope, StorageAccount? parent = null)
+            : this(scope, parent, null, false, (name) => ArmStorageModelFactory.BlobServiceData(
+                name: name ?? "default",
                 resourceType: ResourceTypeName))
         {
         }
 
+        private BlobService(IConstruct scope, StorageAccount? parent = null, string? name = null, bool isExisting = false, Func<string, BlobServiceData>? creator = null)
+            : base(scope, parent, name ?? "default", ResourceTypeName, "2022-09-01", creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="BlobService"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static BlobService FromExisting(IConstruct scope, string name, StorageAccount? parent = null)
+            => new BlobService(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/storage/StorageAccount.cs b/sdk/provisioning/Azure.Provisioning/src/storage/StorageAccount.cs
index 16028ea8ec6a5..7966ebbc2ef79 100644
--- a/sdk/provisioning/Azure.Provisioning/src/storage/StorageAccount.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/storage/StorageAccount.cs
@@ -2,7 +2,6 @@
 // Licensed under the MIT License.
 
 using System;
-using System.Text;
 using Azure.Core;
 using Azure.Provisioning.ResourceManager;
 using Azure.ResourceManager.Storage;
@@ -16,6 +15,7 @@ namespace Azure.Provisioning.Storage
     public class StorageAccount : Resource<StorageAccountData>
     {
         private const string ResourceTypeName = "Microsoft.Storage/storageAccounts";
+        private static readonly Func<string, StorageAccountData> Empty = (name) => ArmStorageModelFactory.StorageAccountData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="StorageAccount"/>.
@@ -26,7 +26,7 @@ public class StorageAccount : Resource<StorageAccountData>
         /// <param name="parent">The parent.</param>
         /// <param name="name">The name.</param>
         public StorageAccount(IConstruct scope, StorageKind kind, StorageSkuName sku, ResourceGroup? parent = null, string name = "sa")
-            : base(scope, parent, name, ResourceTypeName, "2022-09-01", (name) => ArmStorageModelFactory.StorageAccountData(
+            : this(scope, kind, sku, parent, name, false, (name) => ArmStorageModelFactory.StorageAccountData(
                 name: name,
                 resourceType: ResourceTypeName,
                 location: Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
@@ -38,6 +38,21 @@ public StorageAccount(IConstruct scope, StorageKind kind, StorageSkuName sku, Re
             AssignProperty(data => data.Name, GetAzureName(scope, name));
         }
 
+        private StorageAccount(IConstruct scope, StorageKind kind = default, StorageSkuName sku = default, ResourceGroup? parent = null, string name = "sa", bool isExisting = true, Func<string, StorageAccountData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, "2022-09-01", creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="StorageAccount"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static StorageAccount FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new StorageAccount(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/websites/AppServicePlan.cs b/sdk/provisioning/Azure.Provisioning/src/websites/AppServicePlan.cs
index bc70f642958b4..1045c0374e60e 100644
--- a/sdk/provisioning/Azure.Provisioning/src/websites/AppServicePlan.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/websites/AppServicePlan.cs
@@ -15,17 +15,18 @@ namespace Azure.Provisioning.AppService
     public class AppServicePlan : Resource<AppServicePlanData>
     {
         private const string ResourceTypeName = "Microsoft.Web/serverfarms";
+        private static readonly Func<string, AppServicePlanData> Empty = (name) => ArmAppServiceModelFactory.AppServicePlanData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="AppServicePlan"/>.
         /// </summary>
         /// <param name="scope">The scope.</param>
-        /// <param name="resourceName">The resource name.</param>
+        /// <param name="name">The resource name.</param>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
         /// <param name="parent">The resource group.</param>
-        public AppServicePlan(IConstruct scope, string resourceName, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = default)
-            : base(scope, parent, resourceName, ResourceTypeName, version, (name) => ArmAppServiceModelFactory.AppServicePlanData(
+        public AppServicePlan(IConstruct scope, string name, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = default)
+            : this(scope, name, version, location, parent, false, (name) => ArmAppServiceModelFactory.AppServicePlanData(
                 name: name,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
                 sku: new AppServiceSkuDescription() { Name = "B1" },
@@ -33,6 +34,21 @@ public AppServicePlan(IConstruct scope, string resourceName, string version = "2
         {
         }
 
+        private AppServicePlan(IConstruct scope, string name, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = default, bool isExisting = false, Func<string, AppServicePlanData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="AppServicePlan"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static AppServicePlan FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new AppServicePlan(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override Resource? FindParentInScope(IConstruct scope)
         {
diff --git a/sdk/provisioning/Azure.Provisioning/src/websites/WebSite.cs b/sdk/provisioning/Azure.Provisioning/src/websites/WebSite.cs
index 57a753998e886..bb1b3c2854197 100644
--- a/sdk/provisioning/Azure.Provisioning/src/websites/WebSite.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/websites/WebSite.cs
@@ -32,6 +32,7 @@ public enum WebSiteRuntime
     public class WebSite : Resource<WebSiteData>
     {
         private const string ResourceTypeName = "Microsoft.Web/sites";
+        private static readonly Func<string, WebSiteData> Empty = (name) => ArmAppServiceModelFactory.WebSiteData();
 
         private ApplicationSettingsResource AppSettings { get; }
 
@@ -39,20 +40,20 @@ public class WebSite : Resource<WebSiteData>
         /// Initializes a new instance of the <see cref="WebSite"/>.
         /// </summary>
         /// <param name="scope">The scope.</param>
-        /// <param name="resourceName">The resource name.</param>
+        /// <param name="name">The resource name.</param>
         /// <param name="appServicePlan">The appServicePlan.</param>
         /// <param name="runtime">The runtime.</param>
         /// <param name="runtimeVersion">The runtime version</param>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
         /// <param name="parent">The resource group. </param>
-        public WebSite(IConstruct scope, string resourceName, AppServicePlan appServicePlan, WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = null)
-            : base(scope, parent, resourceName, ResourceTypeName, version, (name) => ArmAppServiceModelFactory.WebSiteData(
+        public WebSite(IConstruct scope, string name, AppServicePlan appServicePlan, WebSiteRuntime runtime, string runtimeVersion, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = null)
+            : this(scope, name, appServicePlan, runtime, runtimeVersion, version, location, parent, false, (name) => ArmAppServiceModelFactory.WebSiteData(
                 name: name,
                 location: location ?? Environment.GetEnvironmentVariable("AZURE_LOCATION") ?? AzureLocation.WestUS,
                 resourceType: ResourceTypeName,
                 kind: "app,linux",
-                appServicePlanId: appServicePlan.Id,
+                appServicePlanId: appServicePlan?.Id,
                 siteConfig: ArmAppServiceModelFactory.SiteConfigProperties(
                     linuxFxVersion: $"{runtime.ToString().ToLower()}|{runtimeVersion}",
                     isAlwaysOn: true,
@@ -69,17 +70,32 @@ public WebSite(IConstruct scope, string resourceName, AppServicePlan appServiceP
                     }),
                 isHttpsOnly: true,
                 identity: new ManagedServiceIdentity(ManagedServiceIdentityType.SystemAssigned)))
+        {
+        }
+
+        private WebSite(IConstruct scope, string name, AppServicePlan? appServicePlan = default, WebSiteRuntime runtime = default, string? runtimeVersion = default, string version = "2021-02-01", AzureLocation? location = default, ResourceGroup? parent = null, bool isExisting = false, Func<string, WebSiteData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
         {
             var appSettings = runtime == WebSiteRuntime.Dotnetcore
-                ? new Dictionary<string, string>()
-                {
+            ? new Dictionary<string, string>()
+            {
                     { "SCM_DO_BUILD_DURING_DEPLOYMENT", "False"},
                     { "ENABLE_ORYX_BUILD", "True"}
-                }
-                : new Dictionary<string, string>();
+            }
+            : new Dictionary<string, string>();
             AppSettings = new ApplicationSettingsResource(Scope, appSettings, this);
         }
 
+        /// <summary>
+        /// Creates a new instance of the <see cref="AppServicePlan"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static WebSite FromExisting(IConstruct scope, string name, ResourceGroup? parent = null)
+            => new WebSite(scope, parent: parent, name: name, isExisting: true);
+
         /// <summary>
         /// Adds an application setting to the web site.
         /// </summary>
diff --git a/sdk/provisioning/Azure.Provisioning/src/websites/WebSiteConfigLogs.cs b/sdk/provisioning/Azure.Provisioning/src/websites/WebSiteConfigLogs.cs
index 61823e52d6610..48d9a509a8fea 100644
--- a/sdk/provisioning/Azure.Provisioning/src/websites/WebSiteConfigLogs.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/websites/WebSiteConfigLogs.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using System;
 using Azure.Core;
 using Azure.ResourceManager.AppService;
 using Azure.ResourceManager.AppService.Models;
@@ -13,17 +14,18 @@ namespace Azure.Provisioning.AppService
     public class WebSiteConfigLogs : Resource<SiteLogsConfigData>
     {
         private const string ResourceTypeName = "Microsoft.Web/sites/config";
+        private static readonly Func<string, SiteLogsConfigData> Empty = (name) => ArmAppServiceModelFactory.SiteLogsConfigData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="WebSiteConfigLogs"/>.
         /// </summary>
         /// <param name="scope">The scope.</param>
-        /// <param name="resourceName">The resource name.</param>
+        /// <param name="name">The resource name.</param>
         /// <param name="parent">The parent.</param>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
-        public WebSiteConfigLogs(IConstruct scope, string resourceName, WebSite? parent = null, string version = "2021-02-01", AzureLocation? location = default)
-            : base(scope, parent, resourceName, ResourceTypeName, version, (name) => ArmAppServiceModelFactory.SiteLogsConfigData(
+        public WebSiteConfigLogs(IConstruct scope, string name, WebSite? parent = null, string version = "2021-02-01", AzureLocation? location = default)
+            : this(scope, name, parent, version, location, false, (name) => ArmAppServiceModelFactory.SiteLogsConfigData(
                 name: name,
                 applicationLogs: new ApplicationLogsConfig()
                 {
@@ -43,6 +45,21 @@ public WebSiteConfigLogs(IConstruct scope, string resourceName, WebSite? parent
         {
         }
 
+        private WebSiteConfigLogs(IConstruct scope, string name, WebSite? parent = null, string version = "2021-02-01", AzureLocation? location = default, bool isExisting = false, Func<string, SiteLogsConfigData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="AppServicePlan"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static WebSiteConfigLogs FromExisting(IConstruct scope, string name, WebSite? parent = null)
+            => new WebSiteConfigLogs(scope, parent: parent, name: name, isExisting: true);
+
         /// <inheritdoc/>
         protected override string GetAzureName(IConstruct scope, string resourceName) => resourceName;
     }
diff --git a/sdk/provisioning/Azure.Provisioning/src/websites/WebSitePublishingCredentialPolicy.cs b/sdk/provisioning/Azure.Provisioning/src/websites/WebSitePublishingCredentialPolicy.cs
index 385a4f9551560..0b6ac766edf6b 100644
--- a/sdk/provisioning/Azure.Provisioning/src/websites/WebSitePublishingCredentialPolicy.cs
+++ b/sdk/provisioning/Azure.Provisioning/src/websites/WebSitePublishingCredentialPolicy.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using System;
 using Azure.Core;
 using Azure.ResourceManager.AppService;
 using Azure.ResourceManager.AppService.Models;
@@ -13,19 +14,36 @@ namespace Azure.Provisioning.AppService
     public class WebSitePublishingCredentialPolicy : Resource<CsmPublishingCredentialsPoliciesEntityData>
     {
         private const string ResourceTypeName = "Microsoft.Web/sites/basicPublishingCredentialsPolicies";
+        private static readonly Func<string, CsmPublishingCredentialsPoliciesEntityData> Empty = (name) => ArmAppServiceModelFactory.CsmPublishingCredentialsPoliciesEntityData();
 
         /// <summary>
         /// Initializes a new instance of the <see cref="WebSitePublishingCredentialPolicy"/> class.
         /// </summary>
         /// <param name="scope">The scope.</param>
-        /// <param name="resourceName">The resource name.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The parent.</param>
         /// <param name="version">The version.</param>
         /// <param name="location">The location.</param>
-        public WebSitePublishingCredentialPolicy(IConstruct scope, string resourceName, string version = "2021-02-01", AzureLocation? location = default)
-            : base(scope, null, resourceName, ResourceTypeName, version, (name) => ArmAppServiceModelFactory.CsmPublishingCredentialsPoliciesEntityData(
+        public WebSitePublishingCredentialPolicy(IConstruct scope, string name, WebSite? parent = null, string version = "2021-02-01", AzureLocation? location = default)
+            : this(scope, name, parent, version, location, false, (name) => ArmAppServiceModelFactory.CsmPublishingCredentialsPoliciesEntityData(
                 name: name,
                 allow: false))
         {
         }
+
+        private WebSitePublishingCredentialPolicy(IConstruct scope, string name, WebSite? parent = null, string version = "2021-02-01", AzureLocation? location = default, bool isExisting = false, Func<string, CsmPublishingCredentialsPoliciesEntityData>? creator = null)
+            : base(scope, parent, name, ResourceTypeName, version, creator ?? Empty, isExisting)
+        {
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="AppServicePlan"/> class referencing an existing instance.
+        /// </summary>
+        /// <param name="scope">The scope.</param>
+        /// <param name="name">The resource name.</param>
+        /// <param name="parent">The resource group.</param>
+        /// <returns>The KeyVault instance.</returns>
+        public static WebSitePublishingCredentialPolicy FromExisting(IConstruct scope, string name, WebSite? parent = null)
+            => new WebSitePublishingCredentialPolicy(scope, parent: parent, name: name, isExisting: true);
     }
 }
diff --git a/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/main.bicep b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/main.bicep
new file mode 100644
index 0000000000000..136bc70205674
--- /dev/null
+++ b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/main.bicep
@@ -0,0 +1,15 @@
+targetScope = 'subscription'
+
+
+resource resourceGroup_I6QNkoPsb 'Microsoft.Resources/resourceGroups@2023-07-01' = {
+  name: 'rg-TEST'
+  location: 'westus'
+  tags: {
+    'azd-env-name': 'TEST'
+  }
+}
+
+module rg_TEST_module './resources/rg_TEST_module/rg_TEST_module.bicep' = {
+  name: 'rg_TEST_module'
+  scope: resourceGroup_I6QNkoPsb
+}
diff --git a/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/resources/rg_TEST_module/rg_TEST_module.bicep b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/resources/rg_TEST_module/rg_TEST_module.bicep
new file mode 100644
index 0000000000000..8458fb84f1f1d
--- /dev/null
+++ b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/ExistingResources/resources/rg_TEST_module/rg_TEST_module.bicep
@@ -0,0 +1,65 @@
+
+resource appConfigurationStore_OcIExgz1d 'Microsoft.AppConfiguration/configurationStores@2023-03-01' existing = {
+  name: 'existingAppConfig'
+}
+
+resource keyVault_78IwnSu6G 'Microsoft.KeyVault/vaults@2023-02-01' existing = {
+  name: 'existingVault'
+}
+
+resource keyVaultSecret_ChWKOL5pG 'Microsoft.KeyVault/vaults/secrets@2023-02-01' existing = {
+  name: 'existingSecret'
+}
+
+resource storageAccount_LhqOcwcwC 'Microsoft.Storage/storageAccounts@2022-09-01' existing = {
+  name: 'existingStorage'
+}
+
+resource blobService_KtyZZZEH1 'Microsoft.Storage/storageAccounts/blobServices@2022-09-01' existing = {
+  name: 'existingBlobService'
+}
+
+resource webSite_C2Aq73IJb 'Microsoft.Web/sites@2021-02-01' existing = {
+  name: 'existingWebSite'
+}
+
+resource webSiteConfigLogs_7A7a8DHfx 'Microsoft.Web/sites/config@2021-02-01' existing = {
+  name: 'existingWebSiteConfigLogs'
+}
+
+resource webSitePublishingCredentialPolicy_thziHKVBm 'Microsoft.Web/sites/basicPublishingCredentialsPolicies@2021-02-01' existing = {
+  name: 'existingWebSitePublishingCredentialPolicy'
+}
+
+resource postgreSqlFlexibleServer_0TaJ8imA6 'Microsoft.DBforPostgreSQL/flexibleServers@2020-06-01' existing = {
+  name: 'existingPostgreSql'
+}
+
+resource sqlServer_O1efuGmrm 'Microsoft.Sql/servers@2022-08-01-preview' existing = {
+  name: 'existingSqlServer'
+}
+
+resource sqlDatabase_m9ZmzLlHS 'Microsoft.Sql/servers/databases@2022-08-01-preview' existing = {
+  name: 'existingSqlDatabase'
+}
+
+resource sqlFirewallRule_SFMW2DxVf 'Microsoft.Sql/servers/firewallRules@2020-11-01-preview' existing = {
+  name: 'existingSqlFirewallRule'
+}
+
+resource redisCache_nxA8uMVGD 'Microsoft.Cache/Redis@2020-06-01' existing = {
+  name: 'existingRedis'
+}
+
+resource deploymentScript_QqrJz7yzH 'Microsoft.Resources/deploymentScripts@2020-10-01' existing = {
+  name: 'existingDeploymentScript'
+}
+
+resource appServicePlan_D5p3EVvRT 'Microsoft.Web/serverfarms@2021-02-01' existing = {
+  name: 'existingAppServicePlan'
+}
+
+resource applicationSettingsResource_6DtpuGITF 'Microsoft.Web/sites/config@2021-02-01' = {
+  parent: webSite_C2Aq73IJb
+  name: 'appsettings'
+}
diff --git a/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/RedisCacheWithExistingKeyVault/main.bicep b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/RedisCacheWithExistingKeyVault/main.bicep
index 313c70f69c6d4..66e545e2fa163 100644
--- a/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/RedisCacheWithExistingKeyVault/main.bicep
+++ b/sdk/provisioning/Azure.Provisioning/tests/Infrastructure/RedisCacheWithExistingKeyVault/main.bicep
@@ -4,7 +4,7 @@ targetScope = 'resourceGroup'
 param location string = resourceGroup().location
 
 
-resource keyVault_gudpA4XUx 'Microsoft.KeyVault/vaults@2023-02-01' existing = {
+resource keyVault_vxw9QYjTK 'Microsoft.KeyVault/vaults@2023-02-01' existing = {
   name: 'existingVault'
 }
 
@@ -22,8 +22,8 @@ resource redisCache_YE3v6ym48 'Microsoft.Cache/Redis@2020-06-01' = {
   }
 }
 
-resource keyVaultSecret_BjriHg4Dh 'Microsoft.KeyVault/vaults/secrets@2023-02-01' = {
-  parent: keyVault_gudpA4XUx
+resource keyVaultSecret_PGXfP6Z9q 'Microsoft.KeyVault/vaults/secrets@2023-02-01' = {
+  parent: keyVault_vxw9QYjTK
   name: 'primaryConnectionString'
   location: location
   properties: {
@@ -31,8 +31,8 @@ resource keyVaultSecret_BjriHg4Dh 'Microsoft.KeyVault/vaults/secrets@2023-02-01'
   }
 }
 
-resource keyVaultSecret_pekkgeXRu 'Microsoft.KeyVault/vaults/secrets@2023-02-01' = {
-  parent: keyVault_gudpA4XUx
+resource keyVaultSecret_bTFii2gaH 'Microsoft.KeyVault/vaults/secrets@2023-02-01' = {
+  parent: keyVault_vxw9QYjTK
   name: 'secondaryConnectionStrin'
   location: location
   properties: {
@@ -40,4 +40,4 @@ resource keyVaultSecret_pekkgeXRu 'Microsoft.KeyVault/vaults/secrets@2023-02-01'
   }
 }
 
-output vaultUri string = keyVault_gudpA4XUx.properties.vaultUri
+output vaultUri string = keyVault_vxw9QYjTK.properties.vaultUri
diff --git a/sdk/provisioning/Azure.Provisioning/tests/ProvisioningTests.cs b/sdk/provisioning/Azure.Provisioning/tests/ProvisioningTests.cs
index 4f3e5a9e460e5..d9d1efa7113d5 100644
--- a/sdk/provisioning/Azure.Provisioning/tests/ProvisioningTests.cs
+++ b/sdk/provisioning/Azure.Provisioning/tests/ProvisioningTests.cs
@@ -240,7 +240,7 @@ public async Task RedisCacheWithExistingKeyVault()
         {
             TestInfrastructure infrastructure = new TestInfrastructure(configuration: new Configuration { UseInteractiveMode = true });
             var cache = new RedisCache(infrastructure);
-            var kv = KeyVault.FromExisting(infrastructure, name: "existingVault");
+            var kv = KeyVault.FromExisting(infrastructure, name: "'existingVault'");
             kv.AddOutput(data => data.Properties.VaultUri, "vaultUri");
 
             // can't mutate existing resource
@@ -578,6 +578,35 @@ public async Task OutputsSpanningModules()
             await ValidateBicepAsync();
         }
 
+        [RecordedTest]
+        public void ExistingResources()
+        {
+            var infra = new TestInfrastructure();
+            var rg = infra.AddResourceGroup();
+            infra.AddResource(AppConfigurationStore.FromExisting(infra, "'existingAppConfig'", rg));
+            var kv = KeyVault.FromExisting(infra, "'existingVault'", rg);
+            infra.AddResource(kv);
+            var sa = StorageAccount.FromExisting(infra, "'existingStorage'", rg);
+            infra.AddResource(sa);
+            var web = WebSite.FromExisting(infra, "'existingWebSite'", rg);
+            infra.AddResource(web);
+            infra.AddResource(KeyVaultSecret.FromExisting(infra, "'existingSecret'", kv));
+            infra.AddResource(PostgreSqlFlexibleServer.FromExisting(infra, "'existingPostgreSql'", rg));
+            var sql = SqlServer.FromExisting(infra, "'existingSqlServer'", rg);
+            infra.AddResource(sql);
+            infra.AddResource(Redis.RedisCache.FromExisting(infra, "'existingRedis'", rg));
+            infra.AddResource(DeploymentScript.FromExisting(infra, "'existingDeploymentScript'", rg));
+            infra.AddResource(SqlDatabase.FromExisting(infra, "'existingSqlDatabase'", sql));
+            infra.AddResource(SqlFirewallRule.FromExisting(infra, "'existingSqlFirewallRule'", sql));
+            infra.AddResource(BlobService.FromExisting(infra, "'existingBlobService'", sa));
+            infra.AddResource(AppServicePlan.FromExisting(infra, "'existingAppServicePlan'", rg));
+            infra.AddResource(WebSiteConfigLogs.FromExisting(infra, "'existingWebSiteConfigLogs'", web));
+            infra.AddResource(WebSitePublishingCredentialPolicy.FromExisting(infra, "'existingWebSitePublishingCredentialPolicy'", web));
+            infra.Build(GetOutputPath());
+            //these resources can't be verified since they won't exist.
+            //await ValidateBicepAsync();
+        }
+
         public async Task ValidateBicepAsync(BinaryData? parameters = null, bool interactiveMode = false)
         {
             if (CoreTestEnvironment.GlobalIsRunningInCI)