Outlook Web Access could not find a mailbox for S-1-5-21-1078081533-790525478-1801674531-17962. If the problem continues, contact technical support for your organization and tell them the following: The mailbox may be stored on a Microsoft Exchange 2000 or Microsoft Exchange 2003 server, or the Active Directory user account was created recently and has not yet replicated to the Active Directory site where this Client Access server is hosted it happened when i deleted the users mailbox and recreated .Then i checked the SID ,its differnet than i mentioned above (after i checked the users sid its different than mentioned ( S-1-5-21-1078081533-790525478-1801674531-17964)

Hi Did you reconnect the old mailbox to the new account? Give us all details so we can help youJonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

Hi Can you tell me the version of your exchange and windows server system? Can you try to connect to mailbox by outlook? It is very useful to help you to solve the issue. According to your saying, I can offer you some relevant article. http://support.microsoft.com/kb/938444 Patches to install: http://support.microsoft.com/kb/2462137 (Server 2008 R2) http://support.microsoft.com/kb/2494297 (Server 2008/Vista) http://support.microsoft.com/kb/927774 (Server 2003)Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.