Hey All, As of today i have users reporting issues with external chat functionality. For some reason all external users (even if they are Teams users) are shown as Skype for Business users. When opening an existing external Teams chat, it display the message "due to an organization change this chat is no longer availlable Please continue your chat here". When the user clicks on the link they are directed to a Skype chat. The external user can recieve the chat in Teams. When the external user replies back, the chat i sent to a Teams chat for the internal user, but they cannot respond unless they use the Skype chat. I wonder how this can suddenly happen without us changing any tenant-settings in the last six months. Maybe you guys have a sugestion on how this can happen. Just to clarify, we have been in Island mode since the beginning (6 years ago) and never had any issues untill today. Thanks!

After closer inspection of the users in my tenant, i found that the following user settings was set incorrectly. InterpretedUserType : PureOnlineSfBUserWithTeamsLicense I then forced the UpgradeToTeams policy to get the users InterpretedUserType changed to InterpretedUserType : PureOnlineTeamsOnlyUser Once this has been set wait 24 hours for it to properly set the user type. Let the user logout and login again and you should be good to go. Steps to take:Connect to MicrosoftTeams powershellUse the command Get-CSOnlineUser Email address removedCheck the output for the InterpretedUserType. If it set to PureOnlineSfbUserWithTeamsLicense and the TeamsUpgradeEffectiveMode is set to Island the user needs to be migrated manually.Run the Grant-CsTeamsUpgradePolicy Email address removed -PolicyName UpgradeToTeamsCheck the migration status with the command Get-CsMeetingMigrationStatusThe status "Pending" and "Succeeded" are correct statusses. If any other status is displayed please consult Microsoft Support.Use the command Get-CSOnlineUser Email address removedCheck the output for the InterpretedUserType. If it set to PureOnlineTeamsOnlyUser and the TeamsUpgradeEffectiveMode is set to TeamsOnly.Up to 24 hours after the migration the Teams back-end needs to catch up with the changes so funky chat behaviour might occur for the user(s)Logoff and logon into the Teams client. If the behaviour persist uninstall Teams entirely, remove all Teams folders from "Program files" and "Appdata\Local" and "Appdata\Roaming". Restart the user-machine and reinstall Teams.After i followed this list the user that i have migrated could use Teams as intended. Hope that this is usefull for you guys.

Hello,Can you create a test TeamsOnly user to compare?"the Skype for Business handles the following integrations that aren't handled in Teams Islands mode:External (federated) communications."https://docs.microsoft.com/en-us/microsoftteams/teams-and-skypeforbusiness-coexistence-and-interoperability

AndresGorzelany I can confirm that I have this issue with an external organisation that have never used SfB to my knowledge, along side my organisation who has never used SfB. If nothing has changed either side, why are we seeing this?

We have the same issue here. So if you have a solution let me know. ThxI have found a temporary workaround, in the app on my iPhone the chat function works perfect.

Teams external chat | Microsoft Community Hub

AndresGorzelany
MVP
Feb 01, 2022
Hello,
Can you create a test TeamsOnly user to compare?

"the Skype for Business handles the following integrations that aren't handled in Teams Islands mode:
External (federated) communications."

https://docs.microsoft.com/en-us/microsoftteams/teams-and-skypeforbusiness-coexistence-and-interoperability
- SkeedCompton
  Copper Contributor
  Feb 01, 2022
  AndresGorzelany
  
  I can confirm that I have this issue with an external organisation that have never used SfB to my knowledge, along side my organisation who has never used SfB. If nothing has changed either side, why are we seeing this?
  - AndresGorzelany
    MVP
    Feb 01, 2022
    So the other org is TeamsOnly?
MisterDimme
Copper Contributor
Feb 01, 2022
We have the same issue here. So if you have a solution let me know. Thx
I have found a temporary workaround, in the app on my iPhone the chat function works perfect.
kevin91
Copper Contributor
Feb 02, 2022
I have the same issue. I also checked the InterpretedUserType on two of my users (one has no problems, the other cannot write to one specific organization) same on both --> AADConnectEnabledOnlineTeamsOnlyUser

Both organizations changed nothing, but I noticed that the Admin Panel looks a bit different since the last time I looked into it. Also, new is the message "
User xy is part of an organization. It's possible they have messaging-related policies that apply to chat."
Besides that, since today, some of our users are not be able to send GIFs anymore. The button is missing.
- JeroenKIT1605
  Copper Contributor
  Feb 07, 2022
  kevin91,
  
  Can you check if you run the commands in the pictures shown below you get the same output?
  - kevin91
    Copper Contributor
    Feb 07, 2022
    JeroenKIT1605
    
    Yes, it looks the same.
ChristianJBergstrom
MVP
Feb 07, 2022
JeroenKIT1605 kevin91 and all. This is a heads-up that the following has rolled out ON as default.

Microsoft Teams users can now chat with any Teams user outside their organization - Microsoft Tech Community

Tenant level: CsTenantFederationConfiguration

AllowTeamsConsumer

AllowTeamsConsumerInbound

User level: CsExternalAccessPolicy

EnableTeamsConsumerAccess

EnableTeamsConsumerInbound
Seunblues
Copper Contributor
May 17, 2024
Run the below on Powershell and should resolve the issue.

Connect-MicrosoftTeams
$x = New-CsEdgeAllowAllKnownDomains
Set-CsTenantFederationConfiguration -AllowedDomains $x
Get-CsTenantFederationConfiguration

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