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Mohammed Hamada's avatar
Mohammed Hamada
Brass Contributor
Jan 23, 2017
Solved

Syncing Multi AD forests to one Office 365 Tenant with multi Exchange organizations

Hello all, 

I would like to understand the possibility of syncing Multi on-premises AD forests with multi on-prem Exchange organizations to one Office 365 tenant to manage and migrate those users but still keep them separated on the same tenant.. 

 

Is this theoritcally possible and if it is, have anyone done it? 

I tried syncing 2 different AD forests with different Exchange version (2010 and 2016) and I can see them on Office 365 and after assigning a license they are enabled on Office 365 but the GAL shows all the users in both organizations.

 

Is it possible to separate those users on office 365 that they don't see eachother or split Exchange Online to separate organizations depending on public domain?

 

Thanks

  • Mohammed Hamada's avatar
    Mohammed Hamada
    Jan 24, 2017

    I finally managed to get it to work, Microsoft in the article doesn't state whether you have to connect to MsolService or to Exchange online to be able to create a new global address list and I was connected to Exchange online thinking I had to do it from there.

     

    After I assigned my user with the address list role and connected to Msolservice I was able to see all the required commands to create new GAL and Address lists.

     

    hope this helps someone. 

5 Replies

  • Hi,

    it is possible to separate users so that one group of users have different address book than the other group. Please read this: https://technet.microsoft.com/en-us/library/hh529948(v=exchg.150).aspx

     

    They are still on the same tenant and part of same exchange organization even thou they cannot see same address book.

    • Mohammed Hamada's avatar
      Mohammed Hamada
      Brass Contributor

      Thanks Marko, so in this scenario i'll have to create an address book policy for each organization and assign the users to the created address book policy .. 

       

      I guess this means that when creating/syncing a new user i'll have to use powershell to assign the user to his organization's policy .. right? 

       

      Thanks a lot :) 

      • Mohammed Hamada's avatar
        Mohammed Hamada
        Brass Contributor

        I tried creating new address book policy after enabling the address book policy routing but the command says that it couldn't be recognized on Exchange online

         

        What am I missing?