Unable to get MeetingId and teamsContext properties in a teams tab that has been added to a meeting

[mohammadamer]

Unable to get MeetingId and teamsContext properties in a teams tab that has been added to a meeting. What could be wrong ?
Caould you please help ?

Description

MeetingId in teamsContext is always null and almost all TeamsContext properties.

To Reproduce

Steps to reproduce the behavior:

1. Create a C# team tab app in visual studio
2. Change the code a bit to retrieve current the meeting Id where the tab has been added.
3. when debugging no errors but almost all properties are null
4. See screenshot

Expected

Expected behavior is to be able to retrieve the teams context properties and the meeting Id

Screenshots

Code changes to get meeting Id

await base.OnAfterRenderAsync(firstRender);

    if(firstRender)
    {
        await MicrosoftTeams.InitializeAsync();
        isInTeams = await MicrosoftTeams.IsInTeams();

        if (isInTeams)
        { 
            var teamsMeeting = await MicrosoftTeams.GetTeamsContextAsync(); //teamsmeeting properties always null
            if (!String.IsNullOrEmpty(teamsMeeting.MeetingId))
                meetingId = teamsMeeting.MeetingId;
            else
                meetingId = "";
        }
        else
        {
            errorMessage = "Not running in Microsoft Teams.";
        }

        isLoading = false;
        StateHasChanged();            
    }

[Ayca Bas (aycabas)]

Hi mohammadamer, have you tried getting the Teams meeting id through Microsoft Graph onlineMeeting? This way you may access to all the details of the meeting. Here is the documentation for the details, let me know if you need further assistance on this: https://learn.microsoft.com/en-us/graph/api/onlinemeeting-get?view=graph-rest-1.0&tabs=http

[Markus Möller (mmsharepoint)]

The meetingID from the teamsContext is not the onlineMeetingId but an encrypted version if the chatID
Yannick Reekmans figured this out once upon a time:
https://blog.yannickreekmans.be/get-full-meeting-details-in-a-teams-meetings-app-without-using-bot-sdk/

[mohammadamer]

Thanks for the explaination Markus Möller (@mmsharepoint)
It took from me two days until I figured it out. :)

[JerryYang (JerryYangKai)]

Tracking here OfficeDev/microsoft-365-agents-toolkit#7953

[Markus Möller (mmsharepoint)]

I could only give you answers dealing with JavaScript. Didn't try to refactor that to C#, yet. Even in my Visual Studio projects.
Would that help?

[mohammadamer]

With the help of the article that you mentioned and the explanation in this issue
and also @ explanation. This would help :)

Thanks a lot Ayca Bas (@aycabas) Markus Möller (@mmsharepoint) JerryYang (@JerryYangKai)
You are all awesome :)

[Markus Möller (mmsharepoint)]

Here is a TeamsToolkit VisualStudio C# (backend) sample dealing with the teamsContext in TeamsJS SDK v2 in general:
https://github.com/mmsharepoint/tab-sso-graph-upload-pdf-csharp

And here one of my Teams meeting app samples dealing with the meetingID itself. That sample is nodeJS (yoteams) based but I hope you should be able to put the pieces together
https://github.com/mmsharepoint/tab-meeting-details/

[mohammadamer]

Markus Möller (@mmsharepoint)
Thanks a lot Markus. Appreciated!