Event ID - 8200

Event Id8200
SourceMSExchangeIM
DescriptionVirtual server <host name>:<number> encountered error <error code> while starting up. Please correct the situation and restart the Server.
Event InformationAccording to Microsoft:
CAUSE :
The registry settings for the Instant Messaging performance counters are missing or incorrect. They may be missing because of lack of permissions on the registry key.
RESOLUTION :
If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Reference LinksInstant Messaging Virtual Servers Do Not Start

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