You have a Microsoft Exchange Server 2019 organization that contains four Mailboxes servers. You are decommissioning a Mailbox server named EX01.
When you attempt to remove one of the mailbox databases from EX01, you receive a warning message that the database still contains mailboxes.
You run Get-Mailbox ""Server EX01 and confirm that all user mailboxes are hosted on other servers. You need to remove the mailbox database.
What should you do first?