Moving an Exchange 2010 mailbox with New-MoveRequest fails with: "The discovery mailbox, a hidden default mailbox that is required to search mailboxes, can't be found."
Problem You’re transitioning from Exchange 2003 or 2010 and with the infrastructure in place, you notice that your mailbox move fails with the following error which is also logged in the application log as event ID 5000: Failed to save admin audit log for this