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