To resolve this, we need to move or disable the arbitration mailboxes on the server and remove the mailbox database manually.
You need to also ensure you do not have any user mailboxes in the database you are trying to get rid of.
Start Exchange Management Shell and type the command to display mailboxes in the whole forest and not just the domain you are logged into:
[PS] C:Windowssystem32>$AdminSessionADSettings.ViewEntireForest=$True
[PS] C:Windowssystem32>Get-MailboxDatabase -Server nbc-d-mbx02
Name Server Recovery ReplicationType
—- —— ——– —————
Database15 NBC-D-MBX02 False None
[PS] C:Windowssystem32>Get-MailboxDatabase “nbc-d-mbx02Database15” | Get-Mailbox
Now that you have the list of all mailboxes in the exchange database, move it to a different server
To work around the Arbitration mailbox issue, let’s find out the list of all Arbitration mailboxes
[PS] C:Windowssystem32>Get-Mailbox -Arbitration |ft Name, Servername
Name ServerName
—- ———-
SystemMailbox{1f05a927-0695-4348-bb62-d2369dcb23d5} nbc-d-mbx01
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FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042 nbc-d-mbx01
SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9} nbc-d-mbx02
SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c} nbc-d-mbx02
Migration.8f3e7716-2011-43e4-96b1-aba62d229136 nbc-d-mbx02
Now will disable all of those since I do not have a different server to move them to.
[PS] C:Windowssystem32>Disable-Mailbox “SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}” -Arbitration -DisableLastArbitrationMailboxAllowed
Confirm
Are you sure you want to perform this action?
Disabling mailbox “SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}” will remove the Exchange properties from the Active Directory user object and mark the mailbox in the database for removal. If the mailbox has an archive or remote archive, the archive will also be marked for removal. In the case of remote archives, this action is permanent. You can’t reconnect this user to the remote archive again.
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is “Y”): a
[PS] C:Windowssystem32>Disable-Mailbox “SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}” -Arbitration -DisableLastArbitrationMailboxAllowed
Confirm
Are you sure you want to perform this action?
Disabling mailbox “SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}” will remove the Exchange properties from the Active Directory user object and mark the mailbox in the database for removal. If the mailbox has an archive or remote archive, the archive will also be marked for removal. In the case of remote archives, this action is permanent. You can’t reconnect this user to the remote archive again.
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is “Y”): a
[PS] C:Windowssystem32>Disable-Mailbox “Migration.8f3e7716-2011-43e4-96b1-aba62d229136” -Arbitration -DisableLastArbitrationMailboxAllowed
Confirm
Are you sure you want to perform this action?
Disabling mailbox “Migration.8f3e7716-2011-43e4-96b1-aba62d229136” will remove the Exchange properties from the Active Directory user object and mark the mailbox in the database for removal. If the mailbox has an archive or remote archive, the archive will also be marked for removal. In the case of remote archives, this action is permanent. You can’t reconnect this user to the remote archive again.
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is “Y”): a
[PS] C:Windowssystem32>Get-MailboxDatabase -Server nbc-d-mbx02
Name Server Recovery ReplicationType
—- —— ——– —————
Mailbox Database 0912423282 NBC-D-MBX02 False None
[PS] C:Windowssystem32>Remove-MailboxDatabase “Mailbox Database 0912423282”
Confirm
Are you sure you want to perform this action?
Removing mailbox database “Mailbox Database 0912423282”.
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is “Y”): a
WARNING: The specified database has been removed. You must remove the database file located in E:Program FilesMicrosoftExchange ServerV15MailboxMailbox Database 0912423282Mailbox Database 0912423282.edb from your computer manually if it exists. Specified database: Mailbox Database 0912423282
SOURCE: http://msexchangeguru.com/2013/01/02/exchange-2013-error/