ADSelfService Plus lets you ensure the presence of  required user information in Active Directory by coercing the users to update certain important fields when they log on to the user portal. This option will definitely help a great deal in keeping your Windows Active Directory up-to-date with regard to end-user information.

 Steps to force users to update  contact information 

•   Log on to ADSelfService Plus
•   Go to Configuration ->> Administrative Tools->> Self-Update layout. 
•  Set the required fields as 'Mandatory' in your custom layout.
•  Click  the Advanced icon.
•   In the Advanced dialog box that appears, select

•   Click Done to save the settings.

Once enabled, this option won't let users switch tabs until they have updated the mandatory fields.

Note:

To Set a field as mandatory

•     Drag and drop the desired field into the layout.
•     In the Field Selection dialog box that appears, click Options.
•     In the Security section , select  'Mandatory'.
•     Click Done to save the settings.