How to Fix Teams Error “We Couldn’t Connect the Call”

When you’re trying to join an important meeting and Microsoft Teams suddenly displays the message “We couldn’t connect the call”, it can be frustrating and disruptive. This error typically appears when Teams fails to establish a stable connection with Microsoft’s servers or when local system or network settings interfere with the call process.

The issue can occur in both Windows 11 and Windows 10, and it may be related to network instability, firewall restrictions, outdated Teams versions, corrupted cache files, or misconfigured system settings. Fortunately, the problem is usually fixable with a few systematic troubleshooting steps.

In this guide, we’ll walk you through all the reliable methods to fix the Teams error “We couldn’t connect the call” on Windows.

How to Fix Teams Error “We Couldn’t Connect the Call”

Follow the solutions below in order. After each step, try joining a call again to check whether the issue is resolved.

1. Check Your Internet Connection Thoroughly

A weak, unstable, or restricted internet connection is the most common reason behind this Teams call error. Even if your system shows “Connected,” packet loss or low bandwidth can prevent Teams from establishing a real-time voice or video session.

1. Press Windows + I to open Settings.
2. Go to Network & Internet.
3. Confirm your connection status shows Connected.
4. Click on your active connection (Wi-Fi or Ethernet) and verify there are no warnings.
5. Open a web browser and load multiple websites to check responsiveness.
6. Run an internet speed test to ensure you have stable upload and download speeds (video calls typically require at least 1–2 Mbps upload speed).
7. Restart your router and modem by unplugging them for 30–60 seconds, then plugging them back in.
8. After reconnecting, restart your PC and try joining the Teams call again.

If possible, use a wired Ethernet connection instead of Wi-Fi, as it provides more stable connectivity and reduces packet loss during meetings.

2. Fully Restart Microsoft Teams Using Task Manager

Simply closing the Teams window does not always shut down all background processes. If Teams is stuck or its background services are frozen, it may fail to connect calls properly.

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Under the Processes tab, look for Microsoft Teams.
3. If you see multiple entries (such as background processes), select each one.
4. Click End Task to completely terminate all Teams-related processes.
5. Wait a few seconds to ensure all instances are closed.
6. Reopen Microsoft Teams from the Start menu.
7. Sign in again if prompted.
8. Try joining the call.

This forces Teams to start fresh, reload its services, and re-establish a connection with Microsoft’s servers.

3. Check Microsoft Teams Service Status

Sometimes the problem is not on your system at all. If Microsoft’s servers are experiencing outages or service degradation, Teams may fail to connect calls regardless of your local settings.

1. Open your web browser.
2. Visit the official Microsoft 365 Service Status page.
3. Check whether Microsoft Teams is marked as healthy.
4. If there is an outage or advisory notice, review the details provided.

If Microsoft confirms a service disruption, there is nothing to fix on your PC. You will need to wait until the issue is resolved on Microsoft’s end. In such cases, you may try joining via the Teams web version as a temporary workaround.

4. Clear Microsoft Teams Cache Completely

Corrupted cache files are a frequent cause of connection errors in Teams. Over time, temporary files can become outdated or damaged, preventing proper communication with Microsoft servers.

1. Close Microsoft Teams completely.
2. Press Ctrl + Shift + Esc and ensure no Teams processes are running.
3. Press Windows + R to open the Run dialog.
4. Type:%appdata%\Microsoft\Teams
5. Press Enter.
6. Select all files and folders inside the Teams directory.
7. Delete them permanently.
8. Restart your computer.
9. Launch Microsoft Teams again.

When you reopen Teams, it will automatically recreate fresh cache files. You may need to sign in again. This process often resolves call connection errors caused by corrupted local data.

5. Update Microsoft Teams

An outdated version of Teams may cause compatibility and connectivity issues.

1. Open Microsoft Teams.
2. Click your profile picture in the top-right corner.
3. Select Check for updates.
4. Allow Teams to download and install updates.
5. Restart the application.

Keeping Teams updated ensures compatibility with Microsoft’s latest backend changes.

6. Disable VPN or Proxy Connection

VPNs and proxy servers can block or interfere with Teams’ call routing services.

1. Press Windows + I to open Settings.
2. Go to Network & Internet.
3. Click VPN and disconnect any active VPN.
4. Go back and select Proxy.
5. Turn off Use a proxy server if enabled.

After disabling these, restart Teams and test the call again.

7. Allow Teams Through Windows Firewall

Firewall restrictions may block call connectivity.

1. Press Windows + R, type:control firewall.cpl
2. Click Allow an app or feature through Windows Defender Firewall.
3. Click Change settings.
4. Ensure Microsoft Teams is checked for both Private and Public networks.
5. Click OK.

If Teams is missing, click Allow another app and manually add it.

8. Reset Network Settings

If network components are misconfigured, resetting them can resolve the issue.

1. Open Settings.
2. Go to Network & Internet.
3. Click Advanced network settings.
4. Select Network reset.
5. Click Reset now.
6. Restart your PC.

This will reinstall network adapters and reset related settings to default.

9. Repair or Reset Microsoft Teams

If the app installation is damaged, repairing or resetting it can fix call errors.

1. Press Windows + I to open Settings.
2. Go to Apps > Installed apps.
3. Find Microsoft Teams.
4. Click the three dots and select Advanced options.
5. Click Repair.
6. If the issue persists, click Reset.

Repair keeps your data intact, while Reset removes app data.

10. Reinstall Microsoft Teams

If none of the above methods work, reinstalling Teams can resolve deep configuration problems.

1. Open Settings > Apps > Installed apps.
2. Select Microsoft Teams.
3. Click Uninstall.
4. Restart your PC.
5. Download the latest version from the official Microsoft website.
6. Install and sign in again.

A clean installation eliminates corrupted files and misconfigurations.

Conclusion

The Microsoft Teams error “We couldn’t connect the call” is usually caused by internet instability, firewall restrictions, corrupted cache, VPN interference, or outdated app versions. In most cases, thoroughly checking your connection, fully restarting Teams, verifying service status, and clearing the cache will resolve the issue.

By following the structured troubleshooting steps above, you should be able to restore normal call functionality and join meetings without interruptions. If the problem persists even after reinstalling Teams, contacting your organization’s IT administrator may be necessary for further investigation.