Users may encounter errors such as Sorry, we couldnt connect you.
Do you encounter an issue notification saying that we ran into a problem on Microsoft Teams?
In this post, we collect some solutions for you.
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Why Does Microsoft Teams Keep Saying Sorry, We Couldnt Connect You?
Firstly, ensure your machine has an Internet connection.
Besides, check whether Microsoft Teams keeps up to date.
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If any update is available, set up the latest version to take a stab at fix the issue.
Whats more, check for Microsoft service status to examine the general condition of Microsoft Teams.
Finally, verify the Windows Firewall and antivirus parameters to ensure that they allow access to Microsoft Teams.

The Windows Firewall may prevent your program from enter the Internet.
This post shows you how to allow a program through Firewall Windows 10.
If the above programs are working properly, follow the solutions mentioned below to handle the issue.

Simply put, the Microsoft Teams servers couldnt promptly respond to your connection request.
Windows built-in troubleshooting tool can assist in pinpointing and troubleshooting Internet connection problems.
Step 2: Navigate to the following path:Update & Security>Troubleshoot>Additional troubleshooters.
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Step 3: Click theInternet Connectionoption from the list and chooseRun the troubleshooter.
Learn how to troubleshoot Internet connection problems with these 11 tips incl.
WiFi connected but no Internet Windows 10, router not connecting to Internet.

Heres how its done:
Step 1: Close Microsoft Teams.
Then, press theWin+Rkey combination to bring up the Run dialog box.
Step 2: TypeAppDataand press theEnterbutton.

Method 3: Clean Teams Cached Credentials
Step 1: Close Microsoft Teams.
Click theSearchbutton on the taskbar and typeCredential Managerin the search box.
Then, pick the relevant result.
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Step 2: In the pop-up window, click theWindows Credentialsoption.
Step 3: Locate any stored credentials related to Microsoft Teams, click them, and selectRemove.
Facing the glitch notice cached credentials have expired in Microsoft Office?
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Read this post to fix this sign in required trouble.
Then, select theAppsoption.
Step 3: Click theTerminatebutton.
Some users may fail to sign in to Microsoft Teams with the error CAA50021.
To help them solve this error, several methods are listed in this post.