Cross forest migration & O365 tenant migration

Marcus Wong Theen Nam 1,091 Reputation points
2022-09-22T01:46:50.287+00:00

Currently I have a single forest and single domain setup in my environment. I need to separate some of the users out and move them to new AD forest with a new office 365 tenant since they belong to a different entity.
This will have two migration where I need to do a cross forest and office 365 tenant migration. I have below concerns for above migration:

  1. How about the teams channel in source tenant that contains both users that is targeted to move to new forest and those that will be remain?
  2. For file server and SharePoint server in my source forest, I just need to enable SID history and disable SID filtering in my SharePoint server?
  3. For accounts after I migrated to new forest, the account will be left in my source forest as disabled account? Or it is gone from forest A?
  4. Any other things that I need to care about?
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Accepted answer
  1. JimmySalian-2011 41,916 Reputation points
    2022-09-22T09:32:17.9+00:00

    Hi,

    1. How about the teams channel in source tenant that contains both users that is targeted to move to new forest and those that will be remain?
      If you are maintaining same UPN or whatever ImmutableID source anchor in the source domain it should match the AAD Account and do a softmatch to retain the acccess, read about this
    2. For file server and SharePoint server in my source forest, I just need to enable SID history and disable SID filtering in my SharePoint server?
      That is correct and all the groups that provide permissions should be migrated too for access and authorisation
    3. For accounts after I migrated to new forest, the account will be left in my source forest as disabled account? Or it is gone from forest A?
      Keep it disabled and it will stay as long as you dont hit the delete button
    4. Any other things that I need to care about?
      Carry out complete discovery and list down dependencies of the environment. Note down design the information of source and target domain, export all the users and groupd attributes incl AAD users.

    Hope this helps.

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  1. JimmySalian-2011 41,916 Reputation points
    2022-09-24T10:17:19.043+00:00

    Yes guest invite will work with B2B if that is what you want and fulfulls the requirement why not. Think about long term planning and administration and If this answer helped you please mark it as "Verified" so other users can reference it.

    Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

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