Exchange Resource Forest Migration RRS feed

  • Question

  • We have a customer that wants to migrate away from their Exchange 2010 Resource Forest model and instead put the mailboxes into the actual user Forest. Are there any gotchas for doing this type of migration? Does anyone have a guide that could help in planning for this?


    Wednesday, September 6, 2017 2:03 PM


All replies

  • I hope you will find this helpful;

    Please click on "Mark as Answer" and “Vote as Helpful” on the post that helps you, this can be beneficial to other community members.

    • Edited by Faisal.Sharif Wednesday, September 6, 2017 2:10 PM
    • Marked as answer by Shivkumar S Thursday, September 7, 2017 10:43 AM
    Wednesday, September 6, 2017 2:09 PM
  • As you don't have to migrate AD accounts because they are already existing in your user forest, it simplifies a lot. This is a normal inter-forest migration ...

    How many users? Are you planning to use the same smtp namespace? This is a more complicated scenario as you need a legacy namespace for mail routing, free/busy availability (availability address space) and Autodiscover.

    - Dominik

    Wednesday, September 6, 2017 2:47 PM
  • I don't believe the Deployment Assistant takes resource forest migrations into consideration.
    Wednesday, September 6, 2017 2:49 PM
  • Hi,

    I agree with Dominik, it's more simple that switch Exchange with Resource forest to Cross-forest.

    We can install Exchange in Account forest, then configure and publish this new Exchange server. Then we can start to convert linked mailbox to regular mailbox in previous Exchange forest, and enable user mailbox in new Exchange forest.

    At last, we can start mailbox migration between those two Exchange forests.
    1. Use ADMT to move AD user.
    2. Configure Free/Busy sharing and mail flow between them.
    3. Use Prepare-MoveRequest.ps1 to prepare mailbox attribute in target Exchange forest.
    4. Start mailbox migration.

    More details, for your reference:
    By the way, it's a giant project to migrate Exchange cross-forest, please test it in a lab before implement it in a production environment.


    Allen Wang

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact

    Thursday, September 7, 2017 11:47 AM