Default CDO Sessions When You Use Exchange Server 5.5 Data Provider for Mobile Information 2001 Server (296766)

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SUMMARY

When you use Microsoft Mobile Information 2001 Server and the Exchange Server 5.5 Data Provider that is included with Mobile Information 2001 Server to gain access to Exchange Server 5.5 mailboxes, Collaboration Data Objects (CDO) is used to retrieve the data from the Exchange Server 5.5 computer. By default, the maximum number of concurrent CDO sessions that the Exchange Server 5.5 Data Provider creates is 300. After this limit is reached, the oldest idle session is used when a new session is needed.

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In some situations, you may want to increase (or decrease) the number of concurrent sessions according to server specifications and performance.

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.

You can change this value under the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OMA55\CDOSessions\MaxActiveCDOSessionsCount

Change this value only if you understand the implications of such a change because if you change the setting to an incorrect value, the change can cause performance problems.