Can we add multiple domains on Azure AD Connect even if the setup of the on-prem is a one-way trust relationship?

Mark Nagas 20 Reputation points
2023-02-01T15:54:07.76+00:00

Currently the server's AD computer object in AD must be synced to Azure AD using Azure AD Connect before it can be managed in Intune. Can we add multiple domains on Azure AD Connect even if the setup of the on-prem is a one-way trust relationship?

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  1. Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
    2023-02-01T19:17:29.4866667+00:00

    HI there.

    Ok, so you are referring to AD forests, yes. Not domains?

    Is this multiple forests into one Azure tenant?

    from that doc, I dont see a requirement for a two-way trust. Do you have a link to a doc that states that?

    https://learn.microsoft.com/bs-latn-ba/Azure/active-directory/hybrid/plan-connect-topologies#multiple-forests-single-azure-ad-tenant

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  1. Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
    2023-02-01T16:50:43.6+00:00

    AADConnect will sync all the domains in your on-prem AD forest to Azure as long as the domain is verified in Azure:

    https://learn.microsoft.com/en-us/azure/active-directory/hybrid/plan-connect-topologies


  2. Thameur-BOURBITA 36,261 Reputation points Moderator
    2023-02-01T22:50:58.6966667+00:00

    Hi @Mark

    Agree with Andy. Trust is not required if you want synchronize many forest on-prem through same Azure AD connect.

    You don't need trust relationship because when you will add a additional forest to be synced through Azure AD connect , you will use a service account from synced forest to create new connector , then, Azure AD connect will use the same service account to read and import objects from this forest.

    Please don't forget to mark helpful answer as accepted

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