This is directly a "work query", but I'm hoping there are some folk out there with way more Exchange knowledge than me. When we set up Exchange 2010 for work, we somewhat followed MS "best practice guidance" and made a DAG between the two VMs, and it's been way more trouble than it's worth on more than one occasion. Since we really do need to be upgrading to a newer Exchange now, is it possible to go from a DAG setup back to a single server on a newer Exchange? Kind regards Murray Crane