DNS Event 4521 after SP2 on SBS 2003 Std

We are having two servers running SBS 2003 Standard. These were running fine from last 6 months. Recently we installed Service Pack 2 via WSUS on both of these systems and since then we started getting an error in Event Viewer Log. It is as follows:

Event ID is 4521:

The description for Event ID ( 4521) in Source (DNS) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: 9002.

Any idea what does it means? Please help me to get rid of the same. Many thanks.

When did you actually installed the Service Pack? I’m asking this because I have seen many cases where all required services wont start after the first boot which creates all these problem but it gets fixed after second reboot. Did you tried second boot? Just re-check if all Automatic startup services are started and running. Also try to re-run CEICW. It is very helpful after applying SP2.

Thank you very much for the help anshusehgal. As you said I rechecked the services and all are running fine. Also I already reran CEICW but still getting the same problem.

What now?

Hi JoeF, just give a try to this SBS MVPs article regarding SBS SP2: http://msmvps.com/blogs/bradley/arch...ase-notes.aspx. Hope it helps you.

Alternatively, try this as swell: https://groups.google.com/forum/?fro...ns/sdRYBDpWD-c