(This blog post was first published on the original RMS team blog in July 2011.)
When using the ActiveDirectory Rights Management Services Bulk Protection Tool (http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=11122)with Microsoft Outlook 2007 or 2010 Personal Store (.pst) files, you mayexperience a file truncation problem if Microsoft Outlook is set to process filesasynchronously. To prevent this issue, you can configure Outlook to operate insynchronous mode by editing the Windows Registry.
For more information on registryediting, see the following resources:
For more information about personalstorage folders, see How tomanage .pst files Outlook 2007, Outlook 2003, and in Outlook 2002 in MicrosoftKnowledge Base article 287070 (http://support.microsoft.com/kb/287070).
After backing up the registry, you must create the REG_DWORDvalue SyncWMLoad and modify the entry to read 1. The following table shows thepaths and values for Outlook 2010 and 2007
Registry Path under: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
To enable synchronous processing
To disable synchronous processing
The following figure illustrates the modification to enablesynchronous processing for an Outlook 2010 client computer: