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AndrewWilson-7952 asked JimmyYang-MSFT commented

Teams won't connect if I change wifi connection - I then have to restart laptop. Any ideas?

Hi there

Over the last few days I've found that alternating between my home wifi and office wifi is causing issues which prevent Teams from loading up (I'm getting the "We're sorry -- We've run into an issue" message). The only work around I've found is to restart my laptop which is a bit of a faff after every time I switch it on in the morning. Is there any adjustment I can make (I suspect it might be firewall related) to prevent this from happening?

Thanks in advance :)

Cheers, Andy

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Hi @AndrewWilson-7952

Do you have the same issue in Teams web client when switching the wifi connection?

Please Check if you have an internet connection through your wi-fi. If you have a stable internet connection than check that the firewall doesn't block the required IP ranges.

For more information on the IP ranges, you can refer to:

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Thanks @JimmyYang-MSFT

It's the app on my laptop that's affected. I haven't tried the web client (will do tonight) but my wifi is working fine for other things.

Thanks for the ranges link. Is there a dummy's guide you could point me to for making changes to my firewall?

Thanks, Andy

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Hi @AndrewWilson-7952

Here is an article shows you how to change your port in your firewall, you could read the Window 10 part to learn it:

Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

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It has been a while, how is everything going?
If you have any update about this issue, please feel free to post back.

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