Hopefully, the culprit will respond directly, but I'll kick in what I know
of them.

There is a large US company that is backing up some 30,000 desktop clients
to TSM.  They use 10 NT Servers to handle this load.  That breaks down to
3000 clients/system.  So, yes, it can be done.  I don't know for sure, but
I'm thinking they are seeing session counts higher than yours.  If they
aren't they're spreading the backups over a longer window.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs, CO 80949
lipp AT storsol DOT com or kelly.lipp AT storserver DOT com
www.storsol.com or www.storserver.com
(719)531-5926
Fax: (240)539-7175