Event ID - 9002

Event Id9002
DescriptionThe ABV DG service failed to start, error <error code>.
Event InformationAccording to Microsoft:
This event indicates that the internal Recipient Update Service (RUS) in Microsoft Exchange System Attendant failed to start. The RUS is a component of the System Attendant and the code for the RUS is in the ABV_DG.DLL file. When the System Attendant starts, it will load several DLL files and one of them is the ABV_DG.DLL file. A failure to load the file and initiate the RUS can result in this event.
User Action :
Ensure that the ABV_DG.DLL file is present in the location where Exchange server is installed. This is typically the <Drive>:\Program Files\Exchsrvr\Bin folder. If the file is present, ensure that the file is of the correct version for the Exchange Server Version installed. For example, if you have applied SP3 for Exchange Server, ensure that the ABV_DG.DLL file is also at SP3. If all of these items have been checked and the problem still persists, contact Microsoft Product Support Services.
Reference LinksThe ABV DG service failed to start, error .

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