I thought that system attendant is part of the past till today when I had a call with one customer. He was trying to move a mailbox between two exchange 2013 servers and the move request fails immediately with error 'Cannot open mailbox /o=Test Lab/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=MY2013Server/cn=Microsoft System Attendant' If you look at any exchange 2013 mailbox server you won’t find the famous “Microsoft Exchange System Attendant” service. In the past this service used to handle many tasks, for example, it used to handle the offline address book generation and the mailbox move. The new architecture for exchange 2013 depends in a new arbitration mailbox “Migration.8f3e7716-2011-43e4-96b1-aba62d229136” for mailbox move. Knowing the architecture changes I decided to consider this error misleading and investigate the migration mailbox issue. I found that the Migration mailbox is hosted in an offline database which is no more available due to a server crash The solution was to recreate the mailbox again, so I first started to delete the AD object and run Setup.exe/PrepareAD to recreate the AD object again. I’ve to run two more commands to mailbox enable the new AD object and to set the parameter management equal $true Enable - Mailbox - Arbitration - Identity 'Migration.8f3e7716-2011-43e4-96b1-aba62d229136' AND Set - Mailbox 'Migration.8f3e7716-2011-43e4-96b1-aba62d229136' - Arbitration – Management: $true Move started to work and we are all happy.
Jan 29, 2010 Getting this 'critical' message from the Exchange 2010 MBSA: 'The 'homeMDB' value for the Microsoft Exchange System Attendant service on server HESWEXC012 is missing.This will cause reliability problems.' For one of our mailbox servers that is in a Database Availability Group.
![Microsoft system attendant Microsoft system attendant](http://1.bp.blogspot.com/-tR3bJu3alE4/UCTHDYFOpXI/AAAAAAAAAMs/r-gjApp1QyA/s1600/1.jpg)
Good morning, When i run the first command i get this: This task does not support recipients of this type. The specified recipient everest.nl/Users/Migration.8f3e7716-2011-43 e4-96b1-aba62d229136 is of type UserMailbox. Please make sure that this recipient matches the required recipient type f or this task. And that is after we did the setup /preparead command ofcourse.
![Microsoft system attendant Microsoft system attendant](http://msexchangeteam.in/wp-content/uploads/2013/02/image_thumb10.png)
We accidentally deleted the mailbox database on our passive server. The database which gets created during the install of exchange.