diff --git a/x-pack/plugins/synthetics/common/constants/monitor_defaults.ts b/x-pack/plugins/synthetics/common/constants/monitor_defaults.ts
index a926cba109e62..182d70c7f53a0 100644
--- a/x-pack/plugins/synthetics/common/constants/monitor_defaults.ts
+++ b/x-pack/plugins/synthetics/common/constants/monitor_defaults.ts
@@ -47,6 +47,9 @@ export const DEFAULT_COMMON_FIELDS: CommonFields = {
   [ConfigKey.NAMESPACE]: DEFAULT_NAMESPACE_STRING,
   [ConfigKey.MONITOR_SOURCE_TYPE]: SourceType.UI,
   [ConfigKey.JOURNEY_ID]: '',
+
+  // Deprecated, slated to be removed in a future version
+  [ConfigKey.ID]: '',
 };
 
 export const DEFAULT_BROWSER_ADVANCED_FIELDS: BrowserAdvancedFields = {
@@ -88,15 +91,17 @@ export const DEFAULT_BROWSER_SIMPLE_FIELDS: BrowserSimpleFields = {
   [ConfigKey.SOURCE_ZIP_FOLDER]: '',
   [ConfigKey.SOURCE_ZIP_PROXY_URL]: '',
   [ConfigKey.TEXT_ASSERTION]: '',
+  [ConfigKey.URLS]: '',
+  [ConfigKey.FORM_MONITOR_TYPE]: FormMonitorType.MULTISTEP,
+  [ConfigKey.TIMEOUT]: null,
+
+  // Deprecated, slated to be removed in a future version
   [ConfigKey.ZIP_URL_TLS_CERTIFICATE_AUTHORITIES]: undefined,
   [ConfigKey.ZIP_URL_TLS_CERTIFICATE]: undefined,
   [ConfigKey.ZIP_URL_TLS_KEY]: undefined,
   [ConfigKey.ZIP_URL_TLS_KEY_PASSPHRASE]: undefined,
   [ConfigKey.ZIP_URL_TLS_VERIFICATION_MODE]: undefined,
   [ConfigKey.ZIP_URL_TLS_VERSION]: undefined,
-  [ConfigKey.URLS]: '',
-  [ConfigKey.FORM_MONITOR_TYPE]: FormMonitorType.MULTISTEP,
-  [ConfigKey.TIMEOUT]: null,
 };
 
 export const DEFAULT_HTTP_SIMPLE_FIELDS: HTTPSimpleFields = {
diff --git a/x-pack/plugins/synthetics/common/constants/monitor_management.ts b/x-pack/plugins/synthetics/common/constants/monitor_management.ts
index d613d234fc3c1..da3f138091723 100644
--- a/x-pack/plugins/synthetics/common/constants/monitor_management.ts
+++ b/x-pack/plugins/synthetics/common/constants/monitor_management.ts
@@ -77,6 +77,9 @@ export enum ConfigKey {
   ZIP_URL_TLS_KEY_PASSPHRASE = 'source.zip_url.ssl.key_passphrase',
   ZIP_URL_TLS_VERIFICATION_MODE = 'source.zip_url.ssl.verification_mode',
   ZIP_URL_TLS_VERSION = 'source.zip_url.ssl.supported_protocols',
+
+  // deprecated, slated to be removed in a future version
+  ID = 'id',
 }
 
 export const secretKeys = [
diff --git a/x-pack/plugins/synthetics/common/runtime_types/monitor_management/monitor_types.ts b/x-pack/plugins/synthetics/common/runtime_types/monitor_management/monitor_types.ts
index bbb6eb1bb30d6..f0776f9fc9a07 100644
--- a/x-pack/plugins/synthetics/common/runtime_types/monitor_management/monitor_types.ts
+++ b/x-pack/plugins/synthetics/common/runtime_types/monitor_management/monitor_types.ts
@@ -86,6 +86,7 @@ export const CommonFieldsCodec = t.intersection([
     [ConfigKey.PROJECT_ID]: t.string,
     [ConfigKey.ORIGINAL_SPACE]: t.string,
     [ConfigKey.CUSTOM_HEARTBEAT_ID]: t.string,
+    [ConfigKey.ID]: t.string,
   }),
 ]);
 
diff --git a/x-pack/plugins/synthetics/public/legacy_uptime/components/fleet_package/common/normalizers.ts b/x-pack/plugins/synthetics/public/legacy_uptime/components/fleet_package/common/normalizers.ts
index d05730c5dbe17..7f3f7219aa1ad 100644
--- a/x-pack/plugins/synthetics/public/legacy_uptime/components/fleet_package/common/normalizers.ts
+++ b/x-pack/plugins/synthetics/public/legacy_uptime/components/fleet_package/common/normalizers.ts
@@ -96,4 +96,5 @@ export const commonNormalizers: CommonNormalizerMap = {
   [ConfigKey.PROJECT_ID]: getCommonNormalizer(ConfigKey.PROJECT_ID),
   [ConfigKey.CUSTOM_HEARTBEAT_ID]: getCommonNormalizer(ConfigKey.CUSTOM_HEARTBEAT_ID),
   [ConfigKey.ORIGINAL_SPACE]: getCommonNormalizer(ConfigKey.ORIGINAL_SPACE),
+  [ConfigKey.ID]: getCommonNormalizer(ConfigKey.ID),
 };