fix/DOCS-5388

main/docs/customize/login-pages/advanced-customizations/configure.mdx

@@ -23,6 +23,9 @@ A. Navigate to [Dashboard > Branding > Universal Login](https://manage.auth0.com
 	<Frame><img src="/docs/images/cdy7uua7fh8z/ACUL/aculDashboard.png" alt="Auth0 Dashboard ACUL page" /></Frame>
 	6. Select **Head Tags** to add your own HTML `Head Tags`.
 	7. (Optional) Select **Additional Data** to select which additional data to send to the browser.
+	<Callout icon="file-lines" color="#0EA5E9" iconType="regular">
+		**Additional Data** lets you add optional context data properties. For example: The Opt-in context data from [`user`](/docs/libraries/acul/js-sdk/Screens/interfaces/UserMembers). 
+	</Callout>
 
 B. Select **Save & Publish**
 

main/docs/libraries/acul/js-sdk/Screens/interfaces/UserMembers.mdx

@@ -13,15 +13,36 @@ export interface UserMembers {
   enrolledEmails: Array<EnrolledEmail> | null;
   enrolledPhoneNumbers: Array<EnrolledPhoneNumber> | null;
   enrolledDevices: Array<EnrolledDevice> | null;
-  organizations: Organizations[] | null;
-  userMetadata: { [key: string]: string } | null;
-  appMetadata: { [key: string]: string } | null;
+  organizations: Organizations[] | null; // OPT-IN 
+  userMetadata: { [key: string]: string } | null; // OPT-IN
+  appMetadata: { [key: string]: string } | null; // OPT-IN
 }
 ```
 
+
+<Callout icon="file-lines" color="#0EA5E9" iconType="regular">
+
+
+* OPT-IN: You must explicitly configure these properties to make them available to the screen. To learn more, read [Configure ACUL](/docs/customize/login-pages/advanced-customizations/configure). 
+
+
+* When the Auth0 server is not aware of the current user, the `user` properties are not available in the following screens: 
+
+| Screens                  | Screens                   |  Screens                       | Screens                                 |   
+|--------------------------|---------------------------|--------------------------------|-----------------------------------------|
+| Login screens            | MFA OTP screens           | Accept Invitation screens      | InterstitialCaptcha screens             | 
+| Signup screens           | MFA Phone screens         | Device Code screens            | Reset Password screens                  | 
+| Passkey screens          | MFA Push screens          | Email Verification screens     | MFA Country Codes screens               | 
+| Challenge screens        | MFA Recovery Code screens | Logout Aborted screens         | MFA Detect Browser Capabilities screens | 
+| Email Identifier screens | MFA WebAuthn screens      | Logout Complete screens        | MFA Enroll screens                      |  
+| Phone Identifier screens | Accept Invitation screens | Brute Force Protection screens | | 
+
+</Callout>
+
+
 ## Properties
 
-<ParamField body='appMetadata' type='{[key: string]: string; }'>
+<ParamField body='appMetadata' type='Optional | {[key: string]: string; }'> 
 
 <Expandable title="Parameters">
 <ParamField body="[key]" type="string"/>
@@ -68,12 +89,12 @@ export interface UserMembers {
 
 <ParamField body='picture' type='string'/>
 
-<ParamField body='userMetadata' type='{[key: string]: string; }'>
+<ParamField body='userMetadata' type='Optional | {[key: string]: string; }'>
 
 <Expandable title="Parameters">
 <ParamField body="[key]" type="string"/>
 
 </Expandable>
 </ParamField>
 
-<ParamField body='username' type='string'/>
+<ParamField body='username' type='string'/>