We have an Exchange 2013 / 2016 environment and we're preparing to decommission the remaining Exchange 2013 servers. Checking the Arbitration mailboxes we noticed a DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852} in a 2013 db and one in a 2016 db.
Do I need both of these or can I delete one?
Orange County District Attorney