Wednesday, 9 March 2016


Get-Mailbox –Arbitration command to see current location of Arbitration mailboxes.

To recreate the Arbitration Mailboxes we first have to remove everything the accompanying user accounts, which can be found in CN=Users in Active Directory:
When the user accounts are deleted you can run the Get-Mailbox –Arbitration command again to see if they are really removed.
Setup.exe /PrepareAD /IAcceptExchangeServerLicenseTerms command again (from the correct installation media by the way) to recreate the Arbitration Mailboxes:
The user accounts are now created again, and the next step is to Mail-Enable them:
Enable-Mailbox –Arbitration –Identity "FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042"
Enable-Mailbox –Arbitration –Identity "SystemMailbox{1f05a927-8668-4003-adad-9b80758e86db}"
Enable-Mailbox –Arbitration –Identity "SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}"
Enable-Mailbox –Arbitration –Identity "SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}"
To prevent typos you can also use the following command:
Get-User | Where {$_.Name –like "SystemMailbox*"} | Enable-Mailbox -Arbitration
Get-User | Where {$_.Name –like "FederatedEmail*"} | Enable-Mailbox –Arbitration
The DisplayName of the Arbitration Mailbox SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9} needs to be changed to “Microsoft Exchange”. This can be achieved using the following command:
Get-Mailbox –Identity "SystemMailbox{e0dc1c29*" –Arbitration | Set-Mailbox –Arbitration –DisplayName "Microsoft Exchange"
The federation Arbitration Mailbox needs to have a 1MB quota limit set to it, this can be achieved using the following command:
Get-Mailbox –Arbitration –Identity "FederatedEmail*"} | Set-Mailbox –Arbitration –ProhibitSendQuota 1MB
The Arbitration Mailboxes are up and running again, you can check using the Get-Mailbox –Arbitration command:



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