Check the attributes associated with users.
1. Identify your user accounts by various criteria, such as user names, email addresses, or even attributes.2. Make sure the fields you are looking for are configured correctly in the Active Directory.3. Ensure that the default search scopes for those users are active and have the correct search parameters. 4. Confirm that all of the necessary user accounts are available in the directory.5. Double-check that the users are properly assigned to the groups they should be in.6. Confirm that the users have the correct permissions set for their accounts.7. Review the security policies to make sure the proper access levels are configured.