messages wont send to user

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messages wont send to user

Morgan Howard 0

every time i try to send a message to an external user which i have been messaging for over a year, it wont send the messages

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Answer 1

Jay Tr 11,215 Microsoft External Staff Moderator

Hi @Morgan Howard,

Thank you for reaching out. I understand how disruptive it is when a Teams chat that has worked for a long time suddenly stops sending to an external user. To narrow this down quickly, could you please share the details below:

Do you see any error message or notification. If yes, please share the exact wording, or a screenshot if possible.
Does it fail only with this one external person, or with any external recipient. Does it fail only for you, or for other users in your organization as well?
Is ⁠external access (federation) is enabled tenant wide, and whether the external domain is allowed or blocked?
⁠Where does the issue in Teams, Teams desktop app on Windows, Teams desktop app on Mac, or Teams on the web?

Once I have these details, I will be able to provide more targeted solutions for the issue.

Thank you for your time and patience during the process. I'm looking forward to your response.

Jay Tr 11,215 Reputation points Microsoft External Staff Moderator

2026-03-25T22:12:58.3966667+00:00

Hi @Morgan Howard,

I hope you are having a great day. I’m following up on the support thread we've been working through together. At this stage, I’m still working to better understand the issue you’re facing so we can identify the most effective solution.

If you have any additional details to share or if there’s anything specific you’d like me to focus on, please feel free to reach out. I’m always happy to help if you need anything else.

I’m committed to ensuring everything runs smoothly and that your experience remains uninterrupted.

Thank you again for your patience and collaboration.

I look forward to hearing from you soon.

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messages wont send to user

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