Hi, Lets say I have 4 mailboxdatabases (in a DAG), I haven't done any backup so the transaction logs are getting pretty big. If I create 4 new mailboxdatabases and migrate all mailboxes to the new databases, will the transaction logs be truncated, left on the old databases or will they move with the mailboxes to the new databases? If they're left with the old databases, can I just delete those and get rid of the transaction logs? If I can't remove the transaction logs like this, is it possible to truncate the logs without doing a backup? Thanks,

Thanks for the answers. I mapped a network-drive to one server and ran Windows Server Backup, it took a while I can tell you that but the transaction logs got truncated and released a lot of space on the disks :) I didn't know about circular logging before so I will look in to that. Thank you very much!