Background:  I'm running NBU 4.5 MP3 Win2K SP3 master and media servers.  I
have a single Exchange 5.5 SP4 (on NT4 SP6a) server from which I need to
back up the directory.  The server is currently at MP4.  Our organization
has a zero mail retention policy, which means that I *can't* back up the
information store.  In the event of a complete failure, I can only restore
the directory - no mailbox contents.

Problem:  Whenever I back up Exchange (IS or directory) using the Exchange
agent, Exchange stops accepting new connections from most of my clients.
Sometimes I can restart the Exchange services, but I usually have to reboot
because service restarts fail.  I saw this problem with MP3, and applied MP4
to the Exchange server on the recommendation of Veritas support.  We're
still seeing the problem.  The MP4 application also killed Outlook Web
Access (couldn't log in) and the Exchange Event Service (service failed with
no error) until I reapplied Exchange SP4.

Questions:

1.  Has anybody else seen this problem?
2.  Does anybody else only back up an Exchange directory? I'm trying to set
up a scenario where I can recreate all the mailboxes (less their content) on
the primary Exchange server from backups taken of a secondary Exchange
server.  So far, I'm not having much luck.  I need to use a secondary server
until Veritas can figure out the connection problem with my primary server.

Thanks in advance,
Matt