Forum Discussion
"We can't setup the conversation because your organizations are not setup to talk to each other"
I get this message when I try to Teams chat with another tenant. Do both tenants have to be in "Teams Only" mode at the org level for this to work? Tenant A is in Islands Mode with external access enabled, Tenant B is in Teams only mode with external access enabled. Chat message is being initiated from Tenant A.
Thanks!
Looks like I found the issue. When I did a Get-CsTenantFederationConfiguration, the AllowedDomains setting was blank. I added "AllowAllKnownDomains" and chat is working now.
https://www.thirdtier.net/2020/04/10/microsoft-teams-does-not-allow-remote-users-to-connect/
I think this setting was inherited from our Skype for Business configuration which had federation disabled, but that is a guess. Our tenant is still in Islands mode, target is Teams only, and I'm able to chat with them now.
20 Replies
The PowerShell cmdlets mentioned here were certainly helpful (using the Microsoft Teams PowerShell module --not the Skype for Business PowerShell module--)
I fixed this by adding the domain to the allowed list of domains in the Teams Admin center then waited for 10-15 minutes. I was now able to collaborate with users outside our tenant.
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Joe McGowan Hey, I was wondering how it went as you didn't reply. Have to ask if you have verified these settings? (not only the attached policy picture).
https://docs.microsoft.com/en-us/microsoftteams/manage-external-access#enable-federation
Surely isn't this just that Tenant A is in Islands mode, there's no federation from Teams in Islands.
Joe McGowan Hi, I get the feeling that an Allow list is in use here. Have you verified that?
https://docs.microsoft.com/en-us/microsoftteams/manage-external-access#plan-for-external-access
Btw, this is the text next to the toggle:
Users can communicate with other Skype for Business and Teams users
See this as well
https://docs.microsoft.com/en-us/microsoftteams/coexistence-chat-calls-presence#federated-routing-for-new-chats-or-calls
Nothing in the allow/disallow list. I get the feeling both tenants need to be in Teams only mode.
I had this working previously in Islands mode, but I had to go into the Skype for Business Admin Center and allow external communication. That no longer exists, so I may need Powershell to check status. We're going to Teams Only mode in less than 30 days, so I'll see what happens then.
Joe McGowan And how does the other tenant settings look like? You don't necessarily have to be Teams-only as the table I sent shows.
I read your initial post again, you are correct in your scenario in that way that it can ONLY be a Teams RECIPIENT.
Federated routing for new chats or calls
https://docs.microsoft.com/en-us/microsoftteams/coexistence-chat-calls-presence#federated-routing-for-new-chats-or-calls
