Azure AD connect to multiple forests


  • Hi,

    I'm trying to set up Azure AD Connect with a sync from 3 forests to 1 tenant. However, I'm struggling to add the forests in the AD Connect wizard. 

    I'm working with the following domains: with Netbios name "INTRANET" with Netbios name "INTRANET" with Netbios name "CITY"

    In the "Connect your directories" page, I was able to add the "parent" (company owning the tenant) domain but I couldn't add the other domains. All the required ports are open. I am getting the following errors (depending on the format of the credentials; Netbios name, full domain name, UPN, etc):

    The provided user was not found in the directory. Specify a valid domain account
    The specified forest does not exist or cannot be contacted
    The specified domain does not exist or cannot be contacted

    Any idea what the problem could be? Is the fact that they have similar Netbios or top level domains a problem? 

    Please note that I am working with the hosts file for name resolution to the other domains. I don't know if this is a problem or not. 

    Thanks a lot for the help!

    • Edited by Jozef Woo Tuesday, April 11, 2017 2:00 PM
    Tuesday, April 11, 2017 12:44 PM

All replies

  • Hi,
    Thank you for posting questions in the Directory Services, since the problem is more related to Azure AD, I would suggest that you could post in the Azure AD forum:
    The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
    Best regards, 

    Please remember to mark the replies as answers if they help.
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    Wednesday, April 12, 2017 7:25 AM
  • Hi, thanks. I will do that. In case anyone ever bumps in this question and doesn't find an answer, I posted my question here:

    Wednesday, April 12, 2017 7:39 AM