A major yet not so known change. From 60 days we are going to 180 days
on new Active Directory(SP1) implementations and upgrades that have slipstreamed copy.
In other words your backups should be valid for 180 days and deleted objects
are saved for 180 days...
http://support.microsoft.com/kb/q216993/
ADModify is a tool that will enable an AD/Exchange admin to make bulk
changes in user properties.
One of the special treats of this tool is the fact that it provides a simple GUI for
configuring the accepted MAPI level for clients.
You can download the tool at:
http://www.gotdotnet.com/workspaces/workspace.aspx?id=f5cbbfa9-e46b-4a7a-8ed8-3e44523f32e2