Hello everybody, I need a little help with a really strange issue. I have a Windows Server 2003 R2 Enterprise Cluster, Running Exchange Server 2003 Enterprise with SP2. It was working perfectly fine, until a few weeks ago. Now when I create a new user mailbox, I receive the error 9562 and 1022 when I try to login. I know that mailboxes are not shown on system manager until the receive a message or the user sign in, but for sure I can say that mailboxes on my Exchange server are not beeing created. Reading on the internet I found an article with a workaround which indicates that I should restart the System Attendant, it actually work. But it also said that this issue was solved in SP1. The problem is that my server is running SP2. I ran ERROR.EXE tool and the error I get is ecError-MAPI_E_CALL_FAILED. What could be happening? Does anyone has an Idea? Please help I have to migrate 1500 user to this server. Regards, Pablo.

Hi, Try to see if this helps: http://support.microsoft.com/default.aspx?scid=kb;en-us;288807 Leif

Leif: thanks but the RUS is stamping the user. Any other Ideas?

Install the hotfix KB948496 to disabled TCP Chimney Feature on Windows 2003 R2 SP2

I applied the hotfix put the problem doesn't go away. Now when I try to logon it doesn't even show errors on the Event viewer, before it did show an error when you tried to logon. I can confirm that the RUS stamped the user, because the mail addres was added. My Exchange is a Cluster, does it has anything to do with it? Is there something else I should do? Regards, Pablo.