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Floyds_on_Greenwood's avatar
Floyds_on_Greenwood
Brass Contributor
Jul 27, 2020

ADDS trusted forests.domains A. OnPrem EX2013 B.Office 365 into new ADDS and New 0365 Tenant?

Greetings. We have two company's (each with their own forest and single domain) that have operated in a trusted ADDS forest configuration. Each forest contains their own respective mail system. One ...
migration
Floyds_on_Greenwood's avatar
Floyds_on_Greenwood
Brass Contributor
Jul 27, 2020
Howdy @harveer singh Thank you for the response. To answer your questions: 1) We do NOT plan to keep any on-premise exchange post merger. 2) It will be office 365 with objects being synchronized from on-premises active directory with AADConnect. 3) YES - The plan is to consolidate on-premises (both forests) active directory as well ( like AD user migration from one on-premises active directory to another) Would you please tell me more re: AADconnect does support synchronizing objects from two different on-premises active directories via single AADconnect server ( There are a few prerequisites though). Thanks again for your help 🙂
  • harveer singh's avatar
    harveer singh
    Iron Contributor
    Jul 27, 2020

    Hey Floyds_on_Greenwood ,

     

    Here is an article which explains about adding an additional directory in AADConnect : https://www.mustbegeek.com/setup-azure-ad-connect-to-synchronize-multiple-active-directory-forests/

    There are other links in the article talking about prerequisites like Trust between the forests, conditional forwarder etc. You can achieve the configuration without trust as well, the article is a bit old (and has a few ads now agggh) but still works well. Will drop response to your other query in some time a bit occupied right now.

     

    Thanks

      • harveer singh's avatar
        harveer singh
        Iron Contributor
        Jul 30, 2020

        Hey Floyds_on_Greenwood ,

         

        Sorry to keep you waiting, a few more question for you, are you planning to migrate both the ADs ( one with exchange 2013 and the other with Dirsync) to a new forest all together, or are you simply merging the two forests ? Going with merge would certainly remove quite some complexity and would make the plan a bit simpler.  Also is it a compliance requirement to move away from the office 365 tenant you already have? If you can stick to the same tenant and simply add the new domain in the same tenant , it would again ease your work and you wont have to perform a tenant to tenant mailbox migration ( I am assuming you have mailboxes in office 365 for the other forest). 

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