I'm an OS edition user myself, so I don't have the zmbackup command at my disposal, and perhaps I don't understand your archive requirements. According to the documentation:
Quote:
Perform full backup of only user1’s mailbox on server1. Note that hostname does not need full domain if account is used.
zmbackup -f -s server1 -a user1@domain.com |
Looks like you can use the '-t' option to specify a location. This should provide you with a backup/archive of the specified user's mailbox. How does this not meet your requirements? I've never administered Exchange so I have no idea what the ExMerge command does.