External users need read/write access to Teams

Question

I have a scenario:

M365 Tenant A, B and C. A owns a conference room environment with high end equipment. I need users from B and C to be able to schedule AND edit or remove meetings inside Teams. It seems to me some type of B2B setup would work. I have the main tenant and a test tenant right now. I have added a Cross Tenant B2B in both tenants. I then added a guest user in the main tenant. I was able to get the invitation and signed in but I cannot see any applications assigned. How do I add Teams as the app to use for that guest user?

Answer 1

@Jeff Burkett

To enable users from Tenants B and C to schedule (and modify) meetings in your conference room in Tenant A, focus on these points:

 – Make sure your cross‑tenant access settings in Azure AD and the Teams admin center allow the desired interactions.

 – Ensure the guest users have the required licenses from their home tenant.

 – Grant them the appropriate permissions (for example, delegate or resource mailbox permissions) on the Teams Room resource.

There isn’t a need (or a supported way) to “add” Teams as an enterprise application to the guest account in Tenant A—instead, it’s all about licensing and properly configured access policies.

Once these settings are in place, the guest should be able to sign in and act—scheduling, modifying, or canceling meetings—as allowed by your policies in Tenant A.

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