"The Crawler threw an exception" when trying to run a discover scan on .pst files
Error: The crawler threw an exception. Scan details log indicates "Failed to initialize MAPI: 80004005"
Starting with DLP version 11, Windows 2008 R2 can now be used as a detection server. Windows 2008 R2 is 64 bit.
In previous versions of DLP only 32 bit Windows 2003 Enterprise Edition was supported.
For Discover to scan .PST files on 32bit Windows 2003, you will need to install a 32 bit version of Outlook 2003 SP3 or later.
For Discover to scan .PST files on 64bit Windows 2008 R2, you must install the 64 bit version of Outlook 2010. (Office 2003 and 2007 are 32-bit only)
Page 974 of Symantec_DLP_11.1_Admin_Guide.pdf
The Network Discover Server scanning this target must be running a Windows operating system, and Outlook 2003 SP3 or later must be installed there.
If your Network Discover Server for the scan is running 32-bit Windows, then 32-bit Outlook must be installed.
If your Network Discover Server for the scan is running 64-bit Windows, then 64-bit Outlook must be installed.
■Outlook must be the default email client on the Network Discover Server scanning this target.