We are using MS Exchange Server 2003 to handle our outlook email. We are also running a Black Berry Enterprise Server (BES) on the same box. In order for users to utilize the BES, they need the BES Admin account under their Security Tab in their properties to have the Send As permission. I have 15 users that have no problems with the previously mentioned setup. I opened their properties, added the BES Admin Account to their Security Tab and it works fine. The last user has a problem. Whenever I add BES Admin to his Security Tab the BES Admin Account appears there and then a few minutes later it disappears for some reason.I have tried the instructions provided in the support article #912918 where it states that the Microsoft Exchange Information Store Service needs to be restarted but that doesn't work either.I am wondering if there's anything else I can check or modify to get this to work. It is becoming extremely frustrating for me and the user to keep having this issue. Any help would be extremely appreciated. Thank you.

Is the person that is having a problem a member of any of the admin groups (Domain Admins, Enterprise Admins, Account Operators, Servers Operators, etc...)?