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Joe McGowan's avatar
Joe McGowan
Iron Contributor
Jan 28, 2021
Solved

"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 ...
microsoft teams
  • Joe McGowan's avatar
    Joe McGowan
    Feb 09, 2021

    ChristianBergstrom 

     

    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's avatar
Joe McGowan
Iron Contributor
Feb 09, 2021

ChristianBergstrom 

 

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.

 

  • SyedAkhtar's avatar
    SyedAkhtar
    Copper Contributor
    Aug 27, 2021

    Joe McGowan 

    Hi Joe,

    In Allowed domains how to make "All Allowed domains"

    For me few of them are showing

  • ChristianBergstrom's avatar
    ChristianBergstrom
    Silver Contributor
    Feb 10, 2021

    Joe McGowan Hello, short of time yesterday. Glad it got sorted and thanks for the update!

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