diff --git a/clients/client-rolesanywhere/src/models/models_0.ts b/clients/client-rolesanywhere/src/models/models_0.ts
index 1023bc2358e1..9a3ded2d6792 100644
--- a/clients/client-rolesanywhere/src/models/models_0.ts
+++ b/clients/client-rolesanywhere/src/models/models_0.ts
@@ -77,8 +77,8 @@ export interface CreateProfileRequest {
 
   /**
    * <p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the
-   *             <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
-   * page for more details. </p>
+   * <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
+   * page for more details. In requests, if this value is not provided, the default value will be 3600. </p>
    * @public
    */
   durationSeconds?: number;
@@ -169,8 +169,8 @@ export interface ProfileDetail {
 
   /**
    * <p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the
-   *             <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
-   * page for more details. </p>
+   * <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
+   * page for more details. In requests, if this value is not provided, the default value will be 3600. </p>
    * @public
    */
   durationSeconds?: number;
@@ -1040,8 +1040,8 @@ export interface UpdateProfileRequest {
 
   /**
    * <p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the
-   *             <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
-   * page for more details. </p>
+   * <a href="https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object">CreateSession API documentation</a>
+   * page for more details. In requests, if this value is not provided, the default value will be 3600. </p>
    * @public
    */
   durationSeconds?: number;
diff --git a/codegen/sdk-codegen/aws-models/rolesanywhere.json b/codegen/sdk-codegen/aws-models/rolesanywhere.json
index d7aa39e7f8d8..80b932c53cfa 100644
--- a/codegen/sdk-codegen/aws-models/rolesanywhere.json
+++ b/codegen/sdk-codegen/aws-models/rolesanywhere.json
@@ -86,7 +86,7 @@
         "durationSeconds": {
           "target": "smithy.api#Integer",
           "traits": {
-            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the\n            <a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. </p>",
+            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the \n<a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. In requests, if this value is not provided, the default value will be 3600. </p>",
             "smithy.api#range": {
               "min": 900,
               "max": 43200
@@ -1341,7 +1341,7 @@
         "durationSeconds": {
           "target": "smithy.api#Integer",
           "traits": {
-            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the\n            <a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. </p>"
+            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the \n<a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. In requests, if this value is not provided, the default value will be 3600. </p>"
           }
         }
       },
@@ -1625,7 +1625,7 @@
       "traits": {
         "smithy.api#length": {
           "min": 0,
-          "max": 50
+          "max": 250
         }
       }
     },
@@ -3238,7 +3238,7 @@
         "durationSeconds": {
           "target": "smithy.api#Integer",
           "traits": {
-            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the\n            <a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. </p>",
+            "smithy.api#documentation": "<p> Used to determine how long sessions vended using this profile are valid for. See the <code>Expiration</code> section of the \n<a href=\"https://docs.aws.amazon.com/rolesanywhere/latest/userguide/authentication-create-session.html#credentials-object\">CreateSession API documentation</a>\npage for more details. In requests, if this value is not provided, the default value will be 3600. </p>",
             "smithy.api#range": {
               "min": 900,
               "max": 43200