Steps to Troubleshoot Missing Active Directory User Accounts

1. Check the appropriate filter group
   

   Verify that the user’s Active Directory account is a member of the appropriate filter group.

2. Check the permission of the group
   

   Verify that the group has permission to be included in the Global Address List.

3. Check the permissions of the user
   

   Ensure that the user’s Active Directory account has the correct permission to be viewable on the Global Address List.

4. Run an Active Directory Synchronization
   

   Execute an Active Directory Synchronization to ensure that the user’s account is correctly replicated to the Global Address List.