diff --git a/clients/client-iam/src/endpoint/ruleset.ts b/clients/client-iam/src/endpoint/ruleset.ts
index 702964fd27a2..f7931b2eeea9 100644
--- a/clients/client-iam/src/endpoint/ruleset.ts
+++ b/clients/client-iam/src/endpoint/ruleset.ts
@@ -41,5 +41,5 @@ y={[D]:c,[E]:[true,{[D]:"getAttr",[E]:[{[F]:g},"supportsDualStack"]}]},
 z=[n],
 A=[o],
 B=[{[F]:"Region"}];
-const _data={version:"1.0",parameters:{Region:k,UseDualStack:l,UseFIPS:l,Endpoint:k},rules:[{conditions:[{[D]:b,[E]:[m]}],rules:[{conditions:z,error:"Invalid Configuration: FIPS and custom endpoint are not supported",type:d},{conditions:A,error:"Invalid Configuration: Dualstack and custom endpoint are not supported",type:d},{endpoint:{url:m,properties:p,headers:p},type:e}],type:f},{conditions:[{[D]:b,[E]:B}],rules:[{conditions:[{[D]:"aws.partition",[E]:B,assign:g}],rules:[{conditions:[q,s,t],endpoint:{url:"https://iam.amazonaws.com",properties:u,headers:p},type:e},{conditions:[q,n,t],endpoint:{url:"https://iam-fips.amazonaws.com",properties:u,headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-cn"]},s,t],endpoint:{url:"https://iam.cn-north-1.amazonaws.com.cn",properties:{[G]:[{name:i,[H]:j,[I]:"cn-north-1"}]},headers:p},type:e},{conditions:[v,s,t],endpoint:w,type:e},{conditions:[v,n,t],endpoint:w,type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso"]},s,t],endpoint:{url:"https://iam.us-iso-east-1.c2s.ic.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-iso-east-1"}]},headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso-b"]},s,t],endpoint:{url:"https://iam.us-isob-east-1.sc2s.sgov.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-isob-east-1"}]},headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso-f"]},s,t],endpoint:{url:"https://iam.us-isof-south-1.csp.hci.ic.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-isof-south-1"}]},headers:p},type:e},{conditions:[n,o],rules:[{conditions:[{[D]:c,[E]:[a,x]},y],rules:[{endpoint:{url:"https://iam-fips.{Region}.{PartitionResult#dualStackDnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"FIPS and DualStack are enabled, but this partition does not support one or both",type:d}],type:f},{conditions:z,rules:[{conditions:[{[D]:c,[E]:[x,a]}],rules:[{endpoint:{url:"https://iam-fips.{Region}.{PartitionResult#dnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"FIPS is enabled but this partition does not support FIPS",type:d}],type:f},{conditions:A,rules:[{conditions:[y],rules:[{endpoint:{url:"https://iam.{Region}.{PartitionResult#dualStackDnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"DualStack is enabled but this partition does not support DualStack",type:d}],type:f},{endpoint:{url:"https://iam.{Region}.{PartitionResult#dnsSuffix}",properties:p,headers:p},type:e}],type:f}],type:f},{error:"Invalid Configuration: Missing Region",type:d}]};
+const _data={version:"1.0",parameters:{Region:k,UseDualStack:l,UseFIPS:l,Endpoint:k},rules:[{conditions:[{[D]:b,[E]:[m]}],rules:[{conditions:z,error:"Invalid Configuration: FIPS and custom endpoint are not supported",type:d},{conditions:A,error:"Invalid Configuration: Dualstack and custom endpoint are not supported",type:d},{endpoint:{url:m,properties:p,headers:p},type:e}],type:f},{conditions:[{[D]:b,[E]:B}],rules:[{conditions:[{[D]:"aws.partition",[E]:B,assign:g}],rules:[{conditions:[q,s,t],endpoint:{url:"https://iam.amazonaws.com",properties:u,headers:p},type:e},{conditions:[q,n,t],endpoint:{url:"https://iam-fips.amazonaws.com",properties:u,headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-cn"]},s,t],endpoint:{url:"https://iam.cn-north-1.amazonaws.com.cn",properties:{[G]:[{name:i,[H]:j,[I]:"cn-north-1"}]},headers:p},type:e},{conditions:[v,s,t],endpoint:w,type:e},{conditions:[v,n,t],endpoint:w,type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso"]},s,t],endpoint:{url:"https://iam.us-iso-east-1.c2s.ic.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-iso-east-1"}]},headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso-b"]},s,t],endpoint:{url:"https://iam.us-isob-east-1.sc2s.sgov.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-isob-east-1"}]},headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso-e"]},s,t],endpoint:{url:"https://iam.eu-isoe-west-1.cloud.adc-e.uk",properties:{[G]:[{name:i,[H]:j,[I]:"eu-isoe-west-1"}]},headers:p},type:e},{conditions:[{[D]:h,[E]:[r,"aws-iso-f"]},s,t],endpoint:{url:"https://iam.us-isof-south-1.csp.hci.ic.gov",properties:{[G]:[{name:i,[H]:j,[I]:"us-isof-south-1"}]},headers:p},type:e},{conditions:[n,o],rules:[{conditions:[{[D]:c,[E]:[a,x]},y],rules:[{endpoint:{url:"https://iam-fips.{Region}.{PartitionResult#dualStackDnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"FIPS and DualStack are enabled, but this partition does not support one or both",type:d}],type:f},{conditions:z,rules:[{conditions:[{[D]:c,[E]:[x,a]}],rules:[{endpoint:{url:"https://iam-fips.{Region}.{PartitionResult#dnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"FIPS is enabled but this partition does not support FIPS",type:d}],type:f},{conditions:A,rules:[{conditions:[y],rules:[{endpoint:{url:"https://iam.{Region}.{PartitionResult#dualStackDnsSuffix}",properties:p,headers:p},type:e}],type:f},{error:"DualStack is enabled but this partition does not support DualStack",type:d}],type:f},{endpoint:{url:"https://iam.{Region}.{PartitionResult#dnsSuffix}",properties:p,headers:p},type:e}],type:f}],type:f},{error:"Invalid Configuration: Missing Region",type:d}]};
 export const ruleSet: RuleSetObject = _data;
diff --git a/codegen/sdk-codegen/aws-models/iam.json b/codegen/sdk-codegen/aws-models/iam.json
index c1b549bf318a..6ff4cb182ce8 100644
--- a/codegen/sdk-codegen/aws-models/iam.json
+++ b/codegen/sdk-codegen/aws-models/iam.json
@@ -997,6 +997,57 @@
                       },
                       "type": "endpoint"
                     },
+                    {
+                      "conditions": [
+                        {
+                          "fn": "stringEquals",
+                          "argv": [
+                            {
+                              "fn": "getAttr",
+                              "argv": [
+                                {
+                                  "ref": "PartitionResult"
+                                },
+                                "name"
+                              ]
+                            },
+                            "aws-iso-e"
+                          ]
+                        },
+                        {
+                          "fn": "booleanEquals",
+                          "argv": [
+                            {
+                              "ref": "UseFIPS"
+                            },
+                            false
+                          ]
+                        },
+                        {
+                          "fn": "booleanEquals",
+                          "argv": [
+                            {
+                              "ref": "UseDualStack"
+                            },
+                            false
+                          ]
+                        }
+                      ],
+                      "endpoint": {
+                        "url": "https://iam.eu-isoe-west-1.cloud.adc-e.uk",
+                        "properties": {
+                          "authSchemes": [
+                            {
+                              "name": "sigv4",
+                              "signingName": "iam",
+                              "signingRegion": "eu-isoe-west-1"
+                            }
+                          ]
+                        },
+                        "headers": {}
+                      },
+                      "type": "endpoint"
+                    },
                     {
                       "conditions": [
                         {
@@ -1777,6 +1828,17 @@
               "expect": {
                 "error": "Invalid Configuration: Missing Region"
               }
+            },
+            {
+              "documentation": "Partition doesn't support DualStack",
+              "expect": {
+                "error": "DualStack is enabled but this partition does not support DualStack"
+              },
+              "params": {
+                "Region": "us-isob-east-1",
+                "UseFIPS": false,
+                "UseDualStack": true
+              }
             }
           ],
           "version": "1.0"