Forum Discussion
"We can't setup the conversation because your organizations are not setup to talk to each other"
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.
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.
StevenC365 How about table 2c from my attached picture above?
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.
