One important detail you left out is whether you have configured users for Windows roaming profiles or mandatory user profiles. It's also not clear whether you have a .prf file stored on each machine; that sentence was a bit garbled.
--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
"SkyEyes" wrote in message news

We are configured at our place with an initial install of Outlook 2003 where
is locates your %username% and opens Outlook for that user. In some
instances we have users that needs other profiles besides the default
%username% profile. Example a resource that they need to log into and takes
care of rules, passwords, etc. So another profile is set up on that
workstation. A machines profiles may look like %username%, WWW Conference1,
WWW Conference 2, etc. So we have noticed that it is creating a backup of
the profiles on that workstation. On these workstations some are even logging
into their Outlook account and selecting Tools | Email Accounts | Change |
More Settings | Advanced and adding the other user or resource because they
are being shared something from that user. These are also disappearing.
First as some background, the Exchange group had decided we would not be
using *.pst files, etc. But low and behold when I log in as a resource on my
pc, it seems to create and Outlook.pst file--what is going on? Then we
notice that on these machines several of them have "BACKUP OF %username%" in
the profiles list--maybe even several times. Also, I noted in a discussion
note that someone was having similar problems and you told them to modify the
*.prf with Backup=No. Where is this located because we only we the
c:\program files\microsoft office\custom11.prf.
Please note we have several people that travel and move from machine to
machine.
One last thing, we are also experiencing the same problems on machines that
have a Dell Axim or Tungston attached to the machine. Is there a special
configuration for this?