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Symptoms

The Microsoft Exchange RPC Client Access service crashes on a Microsoft Exchange Server 2010 Mailbox server. Additionally, the following Event ID 4999 is logged in the Application log: 

Cause

This issue is caused by a MAPI_E_CORRUPT_DATA error that occurs when the Exchange Server 2010 Mailbox server tries to process a certain property. Then, the Exchange RPC Client Access service crashes because it cannot handle the MAPI_E_CORRUPT_DATA error.

Resolution

To resolve this issue, install the following update rollup:

2746164 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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