Mapi session “” exceeded the maximum of objects of type “”.

Details
Product: Exchange
Event ID: 9646
Source: MSExchangeIS
Version: 6.5.6940.0
Component: Microsoft Exchange Information Store
Message: Mapi session “<GUID>” exceeded the maximum of <number> objects of type “<text>“.
   
Explanation

A single MAPI session has exceeded the maximum number of objects of a given type. To prevent a single client from affecting the performance of the entire server, this MAPI session was terminated.

   
User Action

This can be caused by a very high usage level by an individual user. If these errors are happening regularly, you can raise the default maximum for the affected object type (for example, to twice its default level). If at this level the specified user is continuing to generate this warning, investigate the user actions that are causing this warning. It can be caused by improper client design or unusual client usage patterns.

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