Why are ALL employees seeing the chat for a Teams meeting they were NOT invited to?

Hi @Brittany Johnson,

Thanks for detailed response.

I've reviewed your case and I'm afraid that you'd need to raise a ticket to our Microsoft support team. They can conduct a back-end logs investigation, live session and escalate you to a suitable team.

To create a Support ticket, you can go to Microsoft 365 admin center 

• Please follow this article: Get support - Microsoft 365 admin | Microsoft Learn. 
• On right bottom corner click on "Help & support"    

• After that choose the "Contact support".   

• Fill out the required information in the form, including a description of the issue you are experiencing. 
• Click on the "Create" button to submit your request. Which will give you a ticket number. 
• Once your request is submitted, a support engineer will be assigned to your case and will contact you to provide assistance. 

I'm sincerely sorry that I can't assist you further at this stage, but this matter may be beyond our current capacity. After submitting a support ticket, you can also share the ticket number with us if you want. We will also monitor the progress from our end.   

Thank you for your understanding and cooperation.

Looking forward to your response and have a great day ahead.  

Please let me know if you need assistance with any of these steps through the process. 

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

Hi Alexis,

Thank you so much for your detailed response! However it unfortunately doesn't seem to offer us a solution. I'm going to respond to your bullet points in kind:

• As we have had this issue before, we deleted the previous meeting series and resent only to the intended group. Since it is a new series, there is no history of people previously included aside from this group
• We would have no problem with people who were invited seeing the chat - the issue is that ALL employees are indiscriminately included in the chat (yes we could remove them, or they could leave, but that is 100+ people and it would be extremely inconvenient to do every time we have this meeting)
• Same as the first bullet, it is a new series so there is no "past", the only people invited were the intended recipients
• We can try inviting all 27 people individually, but I'm skeptical that would fix the issue
• There is no delegate access
• Same as above, we can try individual invites but I doubt that's the problem
• We have done this, only invited participants can bypass the lobby
• I am not seeing this control, would you be able to provide a screen grab? I think this is what we need to be able to do, but the only chat options I see are "On", "Off", and "In-Meeting Only", which I understand to only pertain to the length of time that the chat is able to be active

Thanks for your help!

Hi @Brittany Johnson,

Thanks for reaching out to Q&A Forum. 

Regarding your question about Microsoft Teams meeting chat visibility for users who did not join the meeting, I'd like to explain the current behavior of how chat access is managed. 

This issue is typically caused by how the meeting was scheduled and who was included— directly or indirectly —in the invite or chat thread. Even if the meeting is not a channel meeting, the chat visibility can extend beyond the intended participants due to: 

• Anyone who was ever invited to the meeting series, even if they didn’t attend. 
• People who declined or ignored the invite but were still on the original invite list. 
• Past attendees of recurring meetings, who retain access to the chat even if not invited to the current instance 
• If you have a large distribution lists and invite a group email  everyone in that group may get access to the chat — even if they don’t attend. 
• If someone has delegate access to a calendar and schedules a meeting, it may unintentionally include broader access right 

This is default behavior in Teams. Microsoft treats the meeting chat as a persistent thread tied to the meeting series, not just the current instance.  To help prevent this issue from recurring, consider the following steps: 

• Instead of inviting large distribution lists, send meeting invites directly to individuals or use smaller, restricted-access groups. 
• In the Teams meeting settings, ensure that only invited participants can bypass the lobby and access the chat. This helps limit visibility to intended attendees. 
• Your Teams admin can adjust the Meeting Chat policy to restrict chat access to only those who have accepted the invitation, adding an extra layer of control. Please read about it via Chat issues in Teams meeting - Microsoft Teams | Microsoft Learn 

If your organization has Teams Premium, you can use sensitivity labels to restrict chat access and create meeting templates that enforce chat restrictions. These can prevent copying, forwarding, or even accessing chat content. If no sensitivity label is applied, the default behavior may allow broader visibility. Applying a Confidential or Highly Confidential label can restrict chat access to only invited participants. 

 You can take a look at this document for more information: Manage chat for sensitive Teams meetings - Microsoft Teams | Microsoft Learn.  

Moreover, if you believe it would be helpful, you can submit feedback about this issue through the admin center (if you have admin privileges) or via:

Microsoft 365 Feedback Hub → Send Feedback → Describe your proposal in detail

Your feedback is valuable to Microsoft, and they continuously work to improve their products based on user input.

This limitation is inherent to the current design of the product, which unfortunately means I can’t provide a direct fix for this specific issue. That said, I’m here to support you however I can, whether that’s helping you prepare the necessary details for Microsoft support or answering any other questions you may have.

Your feedback is important; Microsoft actively monitors user input to prioritize improvements. The more feedback they receive on this issue, the more likely it is to be addressed.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

Hi Alexis,

1. The meeting was scheduled via Outlook
2. The attendees were added via a group/distro list
3. It is a recurring meeting, and the meeting options are all as they should be
4. It is appearing in all employees team chats (screen shot attached - it is the Coaches Dialogue)

Thanks for your help!

Hi @Brittany Johnson,

Thank you for bringing this issue to our attention.

To help us investigate further and identify the root cause of the recurring chat visibility problem during your Teams meetings, could you please provide a bit more detail on the following points? 

1. Was the meeting scheduled via Outlook, the Teams calendar, or another method?
2. Were attendees added individually, via a distribution list, Microsoft 365 Group, or a shared calendar? Has the meeting invite been forwarded or shared by any of the attendees?
3. Is this a recurring meeting or a one-time event? Have you reviewed the meeting options (e.g., who can bypass the lobby, who can present)?
4. When you mention that the chat is available to all employees, how are they accessing it? Is it appearing in their Teams chat list or are they receiving notifications?

Your input will help us narrow down the issue and explore potential solutions. Looking forward to your response.

Feel free to include any additional information you think might be relevant beyond the questions I’ve provided. If possible, screenshots showing the issue would be greatly appreciated, they can help clarify the behavior and speed up troubleshooting.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.