User in trusted domain cannot use Outlook to log on to Exchange Server

When you try to use Microsoft Outlook to log on to Microsoft Exchange Server 5.5, you may receive the following error message: The following information appears in Event Viewer on the Exchange Server computer: This behavior occurs in a multiple domain network where the trust relationships are correctly established and where the Exchange Server computer is located in a different domain from the users. Other users in the domain are authenticated.

This problem occurs even if a new account and mailbox are created for you.

This issue may occur if you do not have the correct NTFS file system permissions on the Exchsrvr folder on the Exchange Server computer.

To resolve this issue, grant permissions to the Domain Users group on the Exchsrvr folder:

1. Grant Full Control permissions to the Domain Users group on the Exchsrvr folder, and then propagate permissions to all subfolders.
2. Confirm that the user who cannot log on is not a member of a group that was granted No Access permissions to the Exchsrvr folder.
3. Stop and then restart the directory service.