Issue with external contact in MS Teams

[DiVojich]

Hi all,

one of the users reported unusual cases in his MS Teams chat.

When he chats with this 1 particular external user he has to click on the notification to see the message from the user. Also, he can't write at all. (In chat bar it says, "you can't write because you are not a member of the chat) even though he is.

2nd issue - he will see external users response only if he stays in the chat all the time;

Additional info:

As for the issue:
1.) The issue is showing in both version (desktop & web-version);
2.) The issue already happened a long time ago.

3.) The issue only shows between user & 1 particular external contact. When a user chats with another external contact, everything works fine.

4.) No errors or warnings showing;
5.) The issue is showing in PRIVATE channel;
6.) 2 members of the chat - user who reported issue & external contact;

[#2]

Is this a meeting chat? Can you send some screenshots? The message you talk about is usually because there was a channel meeting setup and that person isn’t a member of the team.
It doesn’t sound like it though since there are external users also using the chat

Adam

[#3]

Hi @adam deltinger 

unfortunately, I can't send screenshots because of GDPR.

Yes, this is a meeting chat.

[#4]

Just blur the personal information :)