We have about70 users inour AD on Server 2003 and Exchange 2003.The Exchange 2003 was a recently added service.About 50% of theAD accounts will not properly create the email address (comes up blank) after creating the Exchange Mailbox for the AD account. Some are just fine. The only way we knowhow to fix this is to delete the AD account and re-create it while addingthe Mailbox. Then all the users profile information has to be copied from one user profile to thenew profile on the local C: of the workstation, which is a ton of work.Is there anyparticular reason that someof theAD accounts will not workcorrectly?Any suggestions on how we could fix this or if anyone has an AD utility that could help us backup the users profile and easily move it to the new profile would be greatly appreciated.Thanks for any suggestions.

Do you have any errors in Application Logs of the server? It could be an issue with Recipient Update Service.HEre's a good article about Recipient Update Service.http://support.microsoft.com/default.aspx?scid=kb;EN-US;319065Please ensure RUS is configured correctly.You can follow troubleshooting steps outlined in the following article.http://support.microsoft.com/default.aspx?scid=kb;EN-US;822794Following Technet Webcast for troubleshooting RUS is also a great learning resource.http://support.microsoft.com/default.aspx?scid=kb;EN-US;897548Bhargav Shukla - MSFT - Exchange Reference: Exchange Server 2007 TechCenter - http://technet.microsoft.com/en-us/library/bb124558.aspx; Exchange Server 2003 TechCenter - http://technet.microsoft.com/en-us/library/bb123872(EXCHG.65).aspx; Microsoft Exchange Team Blog - http://msexchangeteam.com/default.aspx

There were errors on a small number of accounts in the Application Log regarding an inherited permissions issue. I reset each of the accounts permissions back to default and now everything is working. Thanks for the tips.

Good to know.Bhargav Shukla - MSFT - Exchange Reference: Exchange Server 2007 TechCenter - http://technet.microsoft.com/en-us/library/bb124558.aspx; Exchange Server 2003 TechCenter - http://technet.microsoft.com/en-us/library/bb123872(EXCHG.65).aspx; Microsoft Exchange Team Blog - http://msexchangeteam.com/default.aspx