Q: I would like to run the FORCEREBASESUPPRESSALLUPDATES switch for a bulk set of mailboxes. I'm having trouble finding syntax to do this. Is this possible? As it is now I have to have a profile set up for each user and run tzmove one by one.
A: You can use exchange rebasing tool, and in the ini file you can apply this switch against tzmove, and then run rebasing centrally from the rebasing workstation for all users
Here is some info regarding exchange rebasing tool
http://msexchangeteam.com/archive/2007/02/14/435267.aspx (though this link refers to v1, it will give you an idea)