XFOR: Store Notification for CALCON May Stop (198841)

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256986 Description of the Microsoft Windows Registry

SYMPTOMS

The Microsoft Exchange Calendar Connector relies on store notifications for processing MAPI-based queries from Exchange clients. In certain cases, this notification mechanism may stop, and require a restart of the Calendar Connector.

CAUSE

There is a problem with the store's push notification mechanism. In a heavy stress environment, this problem becomes more apparent. This problem occurs more often on high-powered Alpha-based servers than on Intel servers.

WORKAROUND

WARNING: 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.
To work around this problem, add a key to the registry. To do this, follow these steps:

Start Registry Editor (Regedt32.exe).
Locate the following key in the registry:
HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem
NOTE: The above registry key is one path; it has been wrapped for readability.

On the Edit menu, click Add Value, and then add the following registry value:

   Value Name: Notification Timeout
   Data Type:  REG_DWORD
   Value:      1