Additional meeting and call-related features and issues within Microsoft Teams for business
Hello! My name is Mustafa, and I am an Independent Advisor as well as a long-time Microsoft user. I'm sorry that you are experiencing this issue, and I am hopeful that I will be able to help you find a satisfactory solution.
so I did some research about the code that you have provided, and I found this.
"Guest users without Microsoft Teams licenses can't utilize the chat within internally hosted Microsoft Teams meetings
ID: TM439228
Status
Service Degradation
Impacted services
Microsoft Teams
Details Title: Guest users without Microsoft Teams licenses can't utilize the chat within internally hosted Microsoft Teams meetings User Impact: Guest users without Microsoft Teams licenses can't utilize the chat within internally hosted Microsoft Teams meetings.
More info: This impacts external users without Microsoft Teams licenses that attempt to utilize the chat for internally hosted Microsoft Teams meetings within the Microsoft Teams desktop and web clients. Current status: We've confirmed we'll proceed with developing a code fix for deployment to address this issue. We expect development of the fix to be complete by our next scheduled communication, after which the fix will undergo testing and validation before proceeding with deployment to the affected environment. Given the nature of the fix and the associated changes required to resolve the issue, we expect that the solution may take an extended period of time to be deployed. Scope of impact: Your organization is affected by this event, and external users without Microsoft Teams licenses attempting to utilize the chat within internally hosted Microsoft Teams meetings are impacted. Root cause: A code change that interacts with user license checks introduced an issue that prevents external users without a license from accessing internally hosted Microsoft Teams meeting chats."
So I suppose the problem is with the guest accounts that are trying to join in. Based on the quotation above I assume that Microsoft is working on this to get it fixed.
Can you choose to accept the guests from the lobby?
Please let me know if this doesn't work or if you need further assistance.
Warm Regards,
Mustafa