Microsoft KB Archive/251640

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Article ID: 251640

Article Last Modified on 2/27/2007


  • Microsoft Exchange 2000 Server Standard Edition

This article was previously published under Q251640


The Microsoft Exchange 2000 Server system attendant may not start, and the following error messages may be logged in the Windows NT Event Viewer.

Event ID 2060
The DsProxy failed to start, error '%1'.

Event ID 1005
Unexpected error An unknown error has occurred. ID no: fffffffd
Microsoft Exchange System Attendant occurred.


The domain controller that the Exchange 2000 Server computer is communicating with has been configured as a Global Catalog server (GC), but the domain controller was not restarted after it was configured as a GC.


To resolve this problem, restart the domain controller that was configured as a GC. The newly created GC must be restarted to initialize the MAPI interface on the GC.


A GC accepts requests from both MAPI and Lightweight Directory Access Protocol (LDAP) clients, and therefore must load both interfaces on the server. On the GC, MAPI does not dynamically load, and you must restart the GC to initialize the MAPI interface.

The system attendant does not start because a call to the directory service did not return the GCs that are in the domain. The directory service requires a list of the GCs to start, and if the directory service does not start, the system attendant does not start.

Additional query words: exch2kp2w

Keywords: kbprb KB251640