I'm having a problem backing up Exchange 5.5 on an NT 4 server.
The backup of the directory and information store runs every
night and usually works fine, but every couple of weeks it will
hang and require a reboot to abort the job. There are no errors
in the backup log - it just stops...

The application log lists Exchange events 102 (backup started)
and 104 (backup stopped by Exchange) a few seconds later.

Has anybody suffered from this problem and resolved it?

Thanks for any light that can be cast on this.