Microsoft Office applications include an identifier called a GUID (Globally Unique Identifier). This identifier is unique to each machine. As a result, any document could be traced back to its original creator. Vector Development has release a freeware utility Guideon which:
Replaces GUID with either zeros or an optional string you specify.
Can make backup copies in case something unforseen should occur.
Can log it's actions to a file you specify.
Can replace the GUID on all Office files in a given directory or even drive.
Detects office files based on content not name so it will even fix Document Templates.
Optional logging of the orignal GUID.
Support for running from the command line allowing, macros or batch files to call it.
This could be an exposure or a valued component depending on your environment and concerns with security and privacy.