> We have two Exchange servers that we do brick level mailbox backups on
> over the weekends. 

Brick level backups used to be a bad idea for Exchange, back when I was 
doing Exchange backups using BackupExec in 2007. Maybe it's different now 
..

> We use an input file for the list of mailboxes to be
> backed up. Our mail admin keeps moving mailboxes back and forth between
> the servers, I have to update the input file list every time mailboxes
> are moved... Is there an easy way to generate a text file list of all
> the mailboxes on the exchange server that I can use for input for the
> brick level mailbox weekend backups ?? I only know of one way and that's
> to run a manual backup of all the mailboxes and then strip them out from
> the log file, but it takes over 15 hours for the larger of the two
> servers, so that's simply not practical... 

Powershell script to list all the mailboxes? I don't personally know how, 
but I've seen similar sorts of scripts on my Google News Alert that I have 
on Powershell articles from the web.

I'm on a good Windows Admin mailing list; you could try joining it and 
asking. I know at least a couple of the frequent posters are both Exhange 
MVPs and scripting experts. This is the one hosted from Sunbelt Software.