Microsoft Teams outages can be caused by a few common factors, and there are quick ways to check current status and mitigate issues. What’s likely causing the problem

• Service disruption on Microsoft Teams’ side: If many users report issues simultaneously, it’s often due to a temporary outage or degraded service in the Microsoft 365 backend. You might see sign-in errors, frontend loading problems, or failures during meetings. Check if the outage is widespread rather than isolated to your device.

• Local client issues: Sometimes problems are due to the Teams app on your device (desktop or mobile), browser, or network configuration. Signs include persistent “operation failed” errors, crashes during login or joining calls, or device-wide symptoms after recent updates.

• Network or DNS problems: If your organization’s network, VPN, or DNS is having trouble, Teams may fail to connect or performance may be degraded even if the service itself is up. You can test by trying a different network or disabling VPN temporarily.

• Cached data or outdated app: Stale cache or an outdated app can cause sign-in or meeting join failures. Clearing cache or updating/reinstalling Teams often resolves these issues.

Ways to verify and troubleshoot

• Check official status and recent updates:
  • Look for current Microsoft 365 service health updates or Teams-specific status pages to confirm if there’s a known outage or incident affecting many users.

• Quick checks you can run:
  • Sign out and sign back in, on all devices where Teams is used.

* Clear Teams cache and restart the application. On Windows, you can end Teams tasks in Task Manager, then delete the cache directories and reopen Teams. On other platforms, follow the equivalent cache clearing steps.

* Update Teams to the latest version, or reinstall if problems persist.

* Test a different network (mobile data, guest Wi‑Fi, or a VPN off) to determine if the issue is network-related.

• If you rely on meetings and calls:
  • Try joining a meeting via the web client if the desktop app is failing, or vice versa.

* Check if meeting links or recordings are affected by the same issue, which may indicate a broader service problem.

What to do if you need a quick answer now

• If multiple users in your organization report problems, assume a service-wide issue and wait for Microsoft’s status updates. In parallel, run basic local troubleshooting steps (sign out/in, clear cache, update/reinstall, try a different network). This combination covers both server-side and client-side causes.

Direct answer

• The cause of “Teams down” can be due to a broader Microsoft Teams outage or performance issue, or it can be local to your device or network. Start by checking official service health status for the latest incident details, then perform quick client/network troubleshooting (sign out/in, clear cache, update/reinstall, test another network). If the official status indicates an outage, you’ll typically need to wait for Microsoft to restore service.