Internal user and external cannot chat with each other in Teams

Brass Contributor



Please i need your help on this issue.


We have one of our user who is able to chat with an external user in Teams. 


When ever he tries to chat with the external user he get the error message below: "External user need to accept your chat request before you can send your next message"




The only workaround we are using at the moment is that if we add them to a group they are able to chat each other. 

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