If, in a Microsoft Exchange Server 2010 environment, you are running Microsoft Office 2010 on clients that are running either Windows Server 2008 R2 or Windows 7, you may want to disable Cached Exchange Mode for Remote Desktop Server. Users who have portable computers must have Cached Exchange Mode enabled. However, when they log on to the Remote Desktop server, their .ost files are copied as part of their profiles. As a result, too much disk space is used. In this case, it is best to keep Cached Exchange Mode for the clients but disable it for the Remote Desktop server.
To do this, on a Group Policy object (GPO) that is specific for Terminal Servers, set the Use Cached Exchange Mode for new and existing Outlook profiles policy setting to Disabled. You can find this policy setting in the Group Policy object editor, under User Configuration\Administrative Templates\Microsoft Office Outlook 2010\Account Settings\Exchange\Cached Exchange Mode. For more information about how to edit a GPO, see Editing a GPO.
This process sets the following registry key value:
Enable = 0
For more information about Group Policy, see Use Group Policy to enforce Office 2010 settings.
For more information planning for Cached Exchange Mode in Remote Desktop Server, see Cached Exchange Mode in a Remote Desktop Session Host environment: planning considerations (http://go.microsoft.com/fwlink/p/?LinkId=246396).