CK wrote:

We checked in the archive however people don't alwayes archive from
the Mailbox level as they should and instead do it for just the
Inbox. What about a migration (Moving a mailbox from one server to
another), any chance that could wipe out Calendar objects?

Right-click the Calendar folder, choose Properties, and select the
AutoArchive tab. Anything there?
--
Brian Tillman [MVP-Outlook]