Unknown participant now joining

Currently, Microsoft Teams does not provide a built-in option to mute or disable the notifications for "unknown participant is now joining" messages specifically. These notifications are designed to inform meeting participants when someone joins the meeting, including those who are anonymous or not logged in with a verified account.

To manage notifications in Teams more generally, users can adjust their notification settings in the Teams app. However, this may not specifically target the notifications for unknown participants.

If this is a significant concern for your organization, consider providing feedback to Microsoft through their UserVoice or feedback channels, as they often take user feedback into account for future updates.

Hi @Matthew Wasco,

Welcome to Microsoft Q&A forum.

Thank you for reaching out about the “Unknown participant is now joining” notifications in Microsoft Teams. I understand how these alerts can feel disruptive, especially in environments where users have different email domains.

After reviewing the situation, I've found that at this time, there is no configuration available to suppress these notifications. They are intentionally designed as a security measure to alert participants when someone joins without identifiable details, such as dial-in callers or external conferencing systems.

We understand this may be inconvenient, and we truly appreciate your feedback. To help influence future updates, we recommend submitting your suggestion through the Microsoft Feedback Hub. This platform allows Microsoft to gather user input and prioritize enhancements based on demand.

As community moderators, we kindly ask for your understanding that our access to internal development details is limited. Our primary role is to guide users toward the appropriate resources and support channels. While we may not have influenced product design decisions and have limited access to internal development details, we’ll continue doing our best to support you within the scope of our responsibilities.

To submit your feedback:

Go to: Microsoft 365 Feedback Hub > Send Feedback > Describe your proposal in detail     

Once you've submitted your feedback, feel free to share the link here in the comments. I’ll be happy to upvote it to help bring more visibility. 

We’re sorry for any disruption this may cause and thank you for your understanding. If you have any other questions, feel free to reach out.

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

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