Here’s a concise starting point to diagnose and fix Microsoft Teams not working. If you want, I can tailor steps to your device (Windows, macOS, mobile, or web). Likely causes and fixes
- Internet/connectivity issues
- Check your internet connection (speed, stability) and try a different network or a wired connection if possible. A poor network is a very common reason Teams won’t load or stay connected [web results indicate network problems as a frequent cause].
- Time and date settings
- Ensure your computer’s date, time, and time zone are correct. An incorrect clock can prevent Teams from loading or signing in properly. Correcting this often resolves the problem quickly.
- Software version problems
- Update Windows/macOS and the Teams app to the latest versions. Outdated software can lead to loading or crashing issues.
- Installation or VPN/proxy issues
- If Teams was recently installed or updated, try reinstalling. Some environments with strict VPNs or proxies can block Teams components; verify that network settings permit Teams traffic.
- Browser/web app-specific issues
- If you’re using Teams in a browser, clear cookies/cache, disable conflicting browser extensions, or try an alternative browser. The Trusted Sites setting in some browsers can block Teams unless properly configured.
- Service status
- Sometimes the issue is on Microsoft’s side. Check the Teams service status or outage monitors to confirm if global/service-wide problems are occurring.
Step-by-step quick fixes
- Restart and reattempt
- Close Teams completely (task manager on desktop, quit on Mac, or close browser tab if using web) and reopen. If it’s a transient issue, this often resolves it.
- Clear cache and sign in again
- For desktop: sign out, quit, and delete local cache if comfortable, then sign back in. For web: clear browser cache or use an incognito/private window to test.
- Check account and credentials
- Ensure the Microsoft account is active, password is current, and there are no sign-in prompts blocked by security settings. Password changes can cause sign-in hiccups.
- Network exceptions and firewall
- Verify firewall/antivirus aren’t blocking Teams. If in a corporate network, check with IT about required exceptions or proxies. Reconfigure if necessary.
- Reinstall if needed
- Uninstall Teams, reboot, then reinstall the latest version from official sources. This fixes corrupted files or broken installations that prevent loading.
When to seek further help
- If Teams still won’t load or crashes after trying these steps, and you suspect a broader service outage, share your device type (Windows/macOS/iOS/Android/web) and any error messages you see. I can provide targeted guidance or next steps, including logs to collect for support.
Would you like me to tailor these steps to your exact setup (e.g., Windows 10/11 vs macOS, desktop app vs web, or mobile), and include a short checklist you can follow end-to-end?
