Microsoft Teams Troubleshooting Guide

Check Your Email and Password

Make sure you're using your correct Microsoft 365 login. If you have forgotten your password, please contact your local IT team.

Remember you will need to sign in to The University of Warwick's Teams as a Warwick Guest.

Can't sign in?: IT Account password changes for Warwick studentsLink opens in a new window

Using Teams in a Browser?

Try this:

• Clear browser history
  • Clear browser history – Microsoft Edge
  • Clear browser history – ChromeLink opens in a new window
  • Clear browser history – Safari: iPhoneLink opens in a new window
  • Clear browser history - Safari: Mac
  • Clear Browser History - FirefoxLink opens in a new window
• Or use Incognito/Private Mode to avoid problems from saved data
  • Browse in private - Edge
  • Browse in private - Safari

Restart Teams

Fully close Microsoft Teams and open it again. This can fix temporary problems.

To fully close Teams: right click the Teams symbol in the taskbar and choose 'Quit Teams'. It will keep running in the background if you use the X in the top right of the window.

Check Your Internet

Teams needs a stable internet connection. Make sure you're connected to Wi-Fi or a reliable network. You might want to try the below suggestions to fix internet issues:

Check Physical Connections

• Ensure all cables (Ethernet, coaxial, fibre, power) are securely connected.
• Confirm modem and router are plugged in and powered on.

Restart Modem and/or Router

• Unplug both modem and router.
• Wait 30 seconds, then plug them back in (modem first, then router).

Reboot Your Device

• Restart your computer, phone, or tablet.

Check for Outages

• Use your Internet Service Providers app or website to check for outages.

Forget and Reconnect to Wi-Fi

• Remove the Wi-Fi network from your device, then reconnect with the password.

Try a Different Device

• See if the problem is device-specific.

Update Network Drivers or Operating System (OS)

• Ensure your system's network drivers and OS are fully up to date.

Disable VPN or Proxy

• These can interfere with internet access. Disable them and try again.

Update Teams

Using the latest version helps avoid bugs.

• Click your profile picture in Teams.
• Select Check for updates.

Update Teams

Clear Cache (Advanced Fix)

If Teams is slow or won’t load properly, try clearing its stored files:

• Windows: Press Win + R, type %appdata%\Microsoft\Teams, and delete the files in that folder.
• Mac: Open Finder and go to: ~/Library/Application Support/Microsoft/Teams

Clear Teams cache

Sign Out and Back In

• Click your profile picture >Sign out, then sign in again. This refreshes your session.

Check Devices

Go to Settings > Devices and make sure the correct microphone, speakers, and camera are selected.

Set up your videoLink opens in a new window

Set up your audioLink opens in a new window

Make a Test Call

Test your microphone and camera in Teams:

Go to Settings > Devices > Make a test call

Make a test call

Close Other Video Apps

If Zoom, Skype, or other apps are running, they may block your camera or mic. Close them first.

Check Permissions

You can only share files if you have the right permissions in the Team or channel. Ask your team owner if needed.

File sharing in TeamsLink opens in a new window

Check OneDrive Sync

Teams stores files in OneDrive. If it’s not syncing, your files may not upload.

Fix OneDrive sync

Use the Web Version

Go to teams.microsoft.com — sometimes file sharing works better there.

How to sign-in to Microsoft Teams on the web - Service Portal for Warwick studentsLink opens in a new window

Check Outlook Connection

Teams uses Outlook for calendar features. Make sure both apps are signed into the same Microsoft 365 account.

Clear Teams Cache

See the “Clear Cache” step above — this helps fix calendar sync problems.

Warwick Students

• Report your issue using the Service Now 'Report an incident or a fault' formLink opens in a new window
• Ensure you add 'TeamWork' to the subject of the request

Partner University Students and Organisations

If you do not have a Warwick log in to access the Service Now form above:

• Email or ring +44 24 7657 3737
• Ensure you add 'TeamWork' to the subject of the request in any email or mention you are participating in the TeamWork programme to the phone operator.