Microsoft Teams Application exception in Firewall Rule

Question

I have a few PCs I want to lock down from accessing anything but a few URLs and applications. I have created a firewall rule that blocks traffic and provided exceptions for the URLs I want access to, but when I try to launch the Microsoft Teams app on the PC, it does not load. I get "Error code - env_check_error. Failed to connect to settings endpoint". I can access the Teams web application and login just fine. I've tried to find out how to add the application the the exceptions, but I haven't figured it out yet. Can someone please help me to allow the dedicated Microsoft Teams app to open and bypass my firewall rule?

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Julie Hadley · Accepted Answer

My apologies for the late reply. I did try your suggestion, but it did not work. I have since solved this issue. I was putting my new rule in the wrong rule group. Thank you for your time and consideration.

Scott_D_L · Answer

Hi Julie, Did you download the O365 web exception list (tar file) and import those into your firewall? After you do that , then go into the web exceptions and make sure the exceptions are enabled for the Team items.

Microsoft Teams Application exception in Firewall Rule

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