Exchange 2013 – Recreate System Mailboxes

How to: Exchange 2013 – Recreate System Mailboxes

There may be a need to recreate the system mailboxes – known as Arbitration Mailboxes.

To do this, follow this process:

Navigate in Active Directory to the USERS OU, and Delete any Systemmailbox{GUID} users.

Once done, you need to use the Exchange 2013 media appropriate for your version.

So, if you installed from a DVD/ISO, mount that

If you have extracted the latest CU, use that

Run Setup /prepareAd /iacceptexchangeserverlicenseterms

exch_recreate_sysmbx

This will finish and the mailboxes will be recreated.

You can check by running this Powershell command:

get-mailbox -arbitration