Exchange 2007 OAB Removal/Migration to Exchange 2013

Posted on 2014-07-11
Last Modified: 2014-07-13
I am trying to decommission an Exchange Server 2007 after a migration to Exchange 2013.  While attempting to uninstall the Mailbox Role from Exchange 2007 from "Add/Remove Programs" it is failing with error: This Mailbox server is responsible for generating an Offline Address Book. Removal of the mailbox role is not permitted.

I'm not sure if the 2007 OAB data was actually migrated to 2013.  I used ADSI edit to remove the 2007 Public Folder Database, so that data migration might not be possible at this point.  Is that likely to cause problems?

What is the best next step to allow the uninstallation of 2007?  Are there any Powershell commands to remove the OAB from 2007?
Question by:Qualitycomputer
    LVL 41

    Assisted Solution

    login to Exchange 2013, launch EMS and Run this command:

    Move-OfflineAddressBook -Identity "OAB NAME" -Server Exchange2013Servername

    If move fails then remove it


    Author Comment


    How can I identify the "OAB NAME" that needs to be moved?  And if that does indeed fail, can you provide the command to remove it?

    Author Comment

    To identify the OAB Name I ran the command:


    from the Exchange Server 2013 EMS.

    That returned two values:
    Default Offline Address List
    Default Offline Address List (Ex2012)

    If I run the command:


    Can I safely provide the first of the two values?  I don't want to accidentally remove the 2013 version.

    Author Comment

    I've requested that this question be closed as follows:

    Accepted answer: 500 points for amitkulshrestha's comment #a40190940
    Assisted answer: 0 points for Qualitycomputer's comment #a40191036

    for the following reason:

    In EMS I ran:

     Remove-OfflineAddressBook "Default Offline Address List"

    and was then able to uninstall the Mailbox Role in Exchange 2007.
    LVL 19

    Accepted Solution

    I know this question is closing, I wanted to point something out to all experts here...

    Exchange 2013 will create a new OAB, and you cannot move it over from 2007 / 2010 as you use to. As the author stated, you would remove the old OAB and then utilize the new OAB that would be generated on the Exchange 2013 Mailbox role.

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