Exchange 2010 microsoft system attendant mailbox missing

Here’s the step-by-step procedure for fixing the corrupted system mailboxes as well as the “ The user doesn’t have an Exchange mailbox” error. I basically used a troubleshooting tip from a Microsoft KB article that was helpful in fixing a problem with Migration Mailbox and applied that technique to fixing the corrupted system mailboxes. Although a read on a Microsoft Exchange team blog that you can ignore the Migration mailbox error when you upgrade from Exchange 2007 to Exchange 2013 because you will notice that the account is actually working, in my case the situation was different and the account was not working and it was corrupted for sure so I have to fix that account along with the rest. You can type get-user -arbitration and get-mailbox -arbitration to verify this. In my case I noticed that the two System Mailbox accounts, the FederatedEmail account, the Migration account and the DiscoverySearchMailbox account were all corrupted and were in an inconsistent state.

You will find the user accounts in the Users container. Look in Active Directory Users and Computers. I believe the error was due to a problem with the Migration Mailbox, as described in the next section. How do I know? Well, I logged in with those accounts and was able to send and receive email. I looked at the account that I was logged in as well as the account that I was moving and they both had mailboxes. I was using the Exchange Management Console to move the mailboxes when I would get this error. I encountered this error when I was logged in with an account that has the highest level permissions in the Exchange Organization as well as on the Exchange server. The user doesn’t have an Exchange mailbox. I copied and pasted the errors from a popup box into Word 2013 to be able to better analyze them.Īnother error that was the most unusual was the following error. Here’s a sample of the corrupted system mailbox warnings that I was getting. The Exchange Help on TechNet basically said that if you get this error then something is wrong. I also didn’t find anything on Microsoft TechNet or different support forums that was helpful. I only found one reference to this error in the entire Google search database that was tied to Office 365 and wasn’t really quite related to my problem at all. The error said that The user doesn’t have an Exchange mailbox.

In addition, I was getting an error when I tried to move mailboxes from Exchange 2007 to Exchange 2013 database. First there were several system mailboxes that were corrupted and in an inconsistent state. When upgrading from Exchange Server 2007 to Exchange Server 2013 I ran into some errors.

Exchange 2010 microsoft system attendant mailbox missing