We are considering migration from Exchange 2010 to Exchange 2016 and EV is 12.2.2.
If we are to migrate mailboxes in a phased manner with a parallel environment of both Exchange 2010 and 2016, what changes are to be made in Enterprise Vault?
I believe we can add mailbox archiving tasks for the new Exchange 2016 servers to the current Enterprise Vault servers. If a mailbox is migrated from Exchange 2010 to 2016, will EV then figure out if the mailbox has been moved between Exchange 2010 and 2016 at the next provisioning run?
Yes, but you have to follow a number of steps to add the new Exchange servers in EV and ensure a seamless mailbox migration from the old the new Exchange environment. See this technote: https://www.veritas.com/support/en_US/article.100017736