Migrate users from forest to a forest containing linked mailboxes

Watkins, Dean (He/Him/His) 6 Reputation points
2021-11-30T20:35:12.813+00:00

Our scenario is as follows:

Users reside in Forest A.
Linked Mailboxes reside in Forest B.

AD Connect is set to: users based on ObjectSID and MSExchangeMasterAccountSID
ADC Anchor Source: adminDisplayName

We want to migrate users from Forest A to Forest B (resource forest).
Mailboxes are NOT being migrated, just users. (adminDisplayName is populated and will remain same post migration)

AD Connect currently Syncs users fom Forest A, and Exchange objects from Forest B

We have a process to ensure users are only synced to Azure from one forest.

Question is, with the current ADC configuration, will there be problems.

Thank you

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2 answers

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  1. Tony NZ 1 Reputation point
    2022-04-12T20:31:52.717+00:00

    @Anonymous Did you ever get a resolution to your scenario? I am in exactly the same situation as you have described it here -->

    We want to migrate users from Forest A to Forest B (resource forest).
    * Mailboxes are NOT being migrated, just users. (adminDisplayName is populated and will remain same post migration)
    * AD Connect currently Syncs users from Forest A, and Exchange objects from Forest B
    * We have a process to ensure users are only synced to Azure from one forest.

    0 comments No comments

  2. Farooq 101 Reputation points
    2022-09-18T11:30:47.473+00:00

    My suggestion is a bit break fix here.
    just test this first on a pilot users.

    1. move users to non-syncing OU > users will be deleted in azure and you have to restore them back in azure
      Users status will be online once you do this....
    2. Add upn suffix in Forest B...
    3. Create users> ( export form Forest A and import them here in forest B.
    4. Run azure AD connect and sync them ...if soft match fails you will be doing hard match..
    0 comments No comments