I recently upgraded from 5.0.18 -> 6.0 RC1 -> 6.0 GA which all went smoothly. Today will be receiving a new server and would like to perform a vanilla install of 6.0 GA. The reason of going the vanilla route is that a lot of ZCS 5 code was left behind after the upgrade.

With that in mind what is the best method of transferring accounts between two version of ZCS 6 ?

1) Install the new server using a different hostname and the use zmmailbox to migrate the mailbox
2) Perform a zmbackup on the source server, transfer the file to the new server, shutdown the old server and then zmrestore the backup. Obviously the new server will have the old servers hostname.

Thoughts ?