Event ID : 1009

Issue : Suspected issue with IIS metabase running on exchange server.

Event Source: MSExchangeMU

Cause : This issue may occur if there is corruption of the Microsoft Internet Information Services (IIS) metabase on the Exchange 2000 Server computer. Corruption of the IIS metabase may occur for a variety of reasons, including the following:
1. The SystemRoot\System32\Inetsrv folder was scanned by an antivirus agent.
2. The Exchange 2000 Server computer is affected by hardware issues.
3. The Exchange 2000 Server computer was affected by a power outage.

You cannot start the Microsoft Exchange services on your Microsoft Exchange 2000 Server computer. When the Microsoft Exchange System Attendant service tries to start, the following events are logged in the application event log:

Description : Failed to access the metabase, error code is 80080005 (Server execution failed). or
Failed to access the metabase, error code is 80090006 (Invalid Signature).
Suspected issue with IIS metabase running on exchange server.

Action Needed :
1) Check IIS service is running on server.
2) Run Exchange Best Practise Analyzer tool to check configuration issue.
3) Restore the Metabase.bin file from backup

Ref Link:
http://support.microsoft.com/kb/314294/
http://support.microsoft.com/?id=831393