diff --git a/.changes/next-release/feature-AWSBackupStorageAmazonCodeCatalystAmazonCognitoIdentityAmazonCognitoIdentityProviderAWSIdentityandAccessManagementIAMAmazonKinesisAWSElementalMediaStoreDataPlaneAmazonTranscribeServiceAmazonTranscribeStreamingService-9088dc7.json b/.changes/next-release/feature-AWSBackupStorageAmazonCodeCatalystAmazonCognitoIdentityAmazonCognitoIdentityProviderAWSIdentityandAccessManagementIAMAmazonKinesisAWSElementalMediaStoreDataPlaneAmazonTranscribeServiceAmazonTranscribeStreamingService-9088dc7.json
new file mode 100644
index 000000000000..e690c270f703
--- /dev/null
+++ b/.changes/next-release/feature-AWSBackupStorageAmazonCodeCatalystAmazonCognitoIdentityAmazonCognitoIdentityProviderAWSIdentityandAccessManagementIAMAmazonKinesisAWSElementalMediaStoreDataPlaneAmazonTranscribeServiceAmazonTranscribeStreamingService-9088dc7.json
@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS Backup Storage, Amazon CodeCatalyst, Amazon Cognito Identity, Amazon Cognito Identity Provider, AWS Identity and Access Management (IAM), Amazon Kinesis, AWS Elemental MediaStore Data Plane, Amazon Transcribe Service, Amazon Transcribe Streaming Service",
+    "contributor": "",
+    "description": "Switching a set of services onto the new SRA (Smithy Reference Architecture) identity and auth logic that was released in v2.21.0."
+}
diff --git a/services/backupstorage/src/main/resources/codegen-resources/customization.config b/services/backupstorage/src/main/resources/codegen-resources/customization.config
new file mode 100644
index 000000000000..fb50d0a7a6eb
--- /dev/null
+++ b/services/backupstorage/src/main/resources/codegen-resources/customization.config
@@ -0,0 +1,3 @@
+{
+    "useSraAuth": true
+}
diff --git a/services/codecatalyst/src/main/resources/codegen-resources/customization.config b/services/codecatalyst/src/main/resources/codegen-resources/customization.config
new file mode 100644
index 000000000000..fb50d0a7a6eb
--- /dev/null
+++ b/services/codecatalyst/src/main/resources/codegen-resources/customization.config
@@ -0,0 +1,3 @@
+{
+    "useSraAuth": true
+}
diff --git a/services/cognitoidentity/src/main/resources/codegen-resources/customization.config b/services/cognitoidentity/src/main/resources/codegen-resources/customization.config
new file mode 100644
index 000000000000..fb50d0a7a6eb
--- /dev/null
+++ b/services/cognitoidentity/src/main/resources/codegen-resources/customization.config
@@ -0,0 +1,3 @@
+{
+    "useSraAuth": true
+}
diff --git a/services/cognitoidentityprovider/src/main/resources/codegen-resources/customization.config b/services/cognitoidentityprovider/src/main/resources/codegen-resources/customization.config
index 0a61574c89d1..977593026018 100644
--- a/services/cognitoidentityprovider/src/main/resources/codegen-resources/customization.config
+++ b/services/cognitoidentityprovider/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+    "useSraAuth": true,
     "excludedSimpleMethods" : [
         "associateSoftwareToken"
     ],
diff --git a/services/iam/src/main/resources/codegen-resources/customization.config b/services/iam/src/main/resources/codegen-resources/customization.config
index 78b7c2df70ec..f73e03152d6c 100644
--- a/services/iam/src/main/resources/codegen-resources/customization.config
+++ b/services/iam/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+  "useSraAuth": true,
   "verifiedSimpleMethods": [
     "createAccessKey",
     "deleteAccountPasswordPolicy",
diff --git a/services/kinesis/src/main/resources/codegen-resources/customization.config b/services/kinesis/src/main/resources/codegen-resources/customization.config
index caeb1f7c6509..74c0393d4b51 100644
--- a/services/kinesis/src/main/resources/codegen-resources/customization.config
+++ b/services/kinesis/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+  "useSraAuth": true,
   "verifiedSimpleMethods": [
     "describeLimits",
     "listStreams"
diff --git a/services/mediastoredata/src/main/resources/codegen-resources/customization.config b/services/mediastoredata/src/main/resources/codegen-resources/customization.config
index a5746334a293..699e590c39cc 100644
--- a/services/mediastoredata/src/main/resources/codegen-resources/customization.config
+++ b/services/mediastoredata/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+  "useSraAuth": true,
   "excludedSimpleMethods" : [
     "listItems"
   ]
diff --git a/services/transcribe/src/main/resources/codegen-resources/customization.config b/services/transcribe/src/main/resources/codegen-resources/customization.config
index ff06be57a475..541175cdecce 100644
--- a/services/transcribe/src/main/resources/codegen-resources/customization.config
+++ b/services/transcribe/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+    "useSraAuth": true,
     "verifiedSimpleMethods" : [
         "listTranscriptionJobs",
         "listVocabularies"
diff --git a/services/transcribestreaming/src/main/resources/codegen-resources/customization.config b/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
index 4460a0924f95..20377792a23f 100644
--- a/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
+++ b/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
@@ -1,4 +1,5 @@
 {
+    "useSraAuth": true,
     "serviceSpecificHttpConfig": "software.amazon.awssdk.services.transcribestreaming.internal.DefaultHttpConfigurationOptions",
     "skipSyncClientGeneration": true,
     "useLegacyEventGenerationScheme": {