I am migrating to 2016 from 2013. During this process I mistakenly added a 2012 server with exchange 2016. To get the job done, I just created 2 new 2016 servers and moved on. Now I am cleaning up my 2013 environment, and I find I can't remove/delete the 2012 server, because it has a mailbox on it, and it is listed as a SYSTEM{1234}.
Normally I understand the answer to deleting the SYTEM mailbox's is HELL NO!
But, all the arbitration mailboxes have been moved, and the command
Get-Mailbox -Arbitration | fl name,servername,Database,PersistedCapabilities
this mailbox is NOT listed. I tried moving it anyway to be safe, but it will not move. I did dismount the DB with no ill effects, and this is the last mailbox to be handled
So,
1) is this safe to delete?
2) and if not, then how do I remove this server from the farm/cluster
BlankMonkey