XADM: Error Message: An Unknown, Unexpected Error Has Occurred

ID: Q174172

-------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 5.0, 5.5 -------------------------------------------------------------------------- SYMPTOMS ======== When you start the Exchange Administrator program, the following error message may appear: An unknown, unexpected error has occurred. MAPI or an unspecified service provider ID no. 0000000-0000-00000000 CAUSE ===== This may be due to an incorrect version of Riched32.dll or Mapi32.dll in the system32 directory on this computer. This problem may occur if the system has been downgraded to a previous version of Exchange. Setup will not overwrite newer files, and because the newer DLL file is not backward compatible, this error will occur. RESOLUTION ========== To resolve this problem, do the following: 1. Rename Riched32.dll and Mapi32.dll in the winnt\system32 directory. 2. Run Exchange Server Setup and choose Reinstall. If any Exchange service

Keywords          : kbusage XADM 
Version           : WinNT:5.0
Platform          : WINDOWS 
Issue type        : 

Last Reviewed: July 15, 1998