Error message in event viewer

Hi all
I am currently encountering the following errors in event viewer plse
help!

EVENT ID : 116
Microsoft Exchange OLEDB was unable to initialize event system correctly. 
Support for store event may have been disabled. HRESULT = 0x80004005.

For more information, click http://www.microsoft.com/contentredirect.asp.

I have rebuild the recipient update Service, but invain.

EVENT ID:9549
An ambiguous SMTP proxy was found on 0x2 mailboxes in the DS.  The store
cannot map this SMTP proxy to a unique Mailbox GUID.

EVENT ID :8213
System Attendant Service failed to create session for virtual machine
MACSSTEST-SVR. The error number is 0xc1050000.

Q296151
Locate the Server value under the following key in the registry:
 
  
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeFBPublish\Parameters\

 
3. On the Edit menu, click FreeBusyQuerySessions, type "00000000" (without
the
  quotation marks), and then click OK.
There are no keys or value in parameters
With thanks

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