Inter tenant collaboration

Chopra 126 Reputation points
2021-10-04T12:49:03.49+00:00

Recently we separated 2 domains and now we are unable to find users or look up their organization details from the other domain?
How can I fix this issue?

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
4,870 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,874 questions

2 answers

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  1. Kael Yao-MSFT 37,491 Reputation points Microsoft Vendor
    2021-10-07T01:56:25.467+00:00

    Hi @Chopra

    I would like to confirm with you first:
    Do you have an Exchange on-premises server?

    If so, did you mean:

    1. You have two separate AD domains, let's say domain-A and domain-B, and also a domain used for users to login Outlook from internet, let's say domain-C
    2. When domain-a users log in their computer, they use domain-A\username.
      When they log in Outlook from internal, they need to use domain-B\username
    3. And when users log in Outlook from external, they need to use domain-C\username
    4. You would like to have internet users use domain-B\username to log in Outlook (currently they are using domain-C\username)

    If I misunderstood it, please feel free to correct me.

    If it is the case, I suppose domain-C is your mail domain, which has DNS records in the public DNS.
    If you would like to have internet users use domain-B\username instead, you may need to own this domain first and setup the corresponding DNS records in public DNS.

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  2. Chopra 126 Reputation points
    2021-11-09T01:40:12.777+00:00

    Yes, using office 365.

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