Is Microsoft 365 Down? Live status & outage reports

Service info and troubleshooting

Can't Sign Into Your Account

The most common culprit is a cached session that went stale. Clear your browser cookies, open a private window, and try logging in at login.microsoftonline.com again. If you use the desktop app, go to File → Account → Sign Out, then sign back in. Also check that your system clock is accurate — a time mismatch of more than a few minutes breaks authentication silently.

Outlook Stops Sending or Receiving Mail

First, check the outbox for stuck messages and delete any that are frozen there. Then go to Send/Receive → Work Offline and toggle it off if it's active. If the issue persists on the web version too, the problem is likely on the account level — try removing and re-adding the account in the desktop client.

Files Won't Sync in OneDrive

• Look for a red X or yellow warning on the OneDrive tray icon — hover over it to read the actual error code.
• Pause syncing, wait 30 seconds, then resume it.
• If a specific file is blocked, it might have a restricted character in the name (like # or %) — rename it and retry.
• Signing out of OneDrive and back in often clears stuck sync states without losing data.

Teams Messages Not Sending

This usually happens when the app loses its connection mid-session. Click your profile picture, choose Sign Out, relaunch Teams, and sign back in. If messages show as sent but recipients don't see them, the issue is likely a brief server-side delay — give it a few minutes before escalating.

Interface Freezes or Loads Slowly

Heavy browser extensions are often behind sluggish Microsoft 365 performance in the browser. Try disabling them one by one, or switch to a clean browser profile. For desktop apps, go to File → Options → Add-ins and disable COM add-ins that you don't actively use — they load at startup and quietly eat resources.

Excel or Word File Won't Open

• If the file is on SharePoint or OneDrive, try opening it directly in the browser instead of the desktop app.
• A corrupted local cache can block file loading — clear it by going to %​localappdata%\​Microsoft\​Office\​16.​0\​OfficeFileCache and deleting the contents.
• If you get a 'format not supported' error, check that the file extension matches the actual format.