If the problem doesn’t go away, reinstall your Office packages and Teams app. Additionally, update your Office and Teams versions, clear your Teams cache, and repair Office. If Teams won’t open Office files in the desktop app, make sure you’re using the correct URL protocol settings.

Install the tools, log in to your account and check if you can open your files in the desktop app.

Then restart your computer and download Office and Teams again.

Select Office and Teams and hit the Uninstall option.

Go to Control Panel, and select Uninstall a Program.

If nothing worked, try reinstalling Office and Teams.

Check if you can now open your Office files using the Teams desktop app.

Reboot your computer, launch one of your Office apps and log back in.

Launch the Control Panel, navigate to the Credential Manager, and remove your Microsoft login information from Web Credentials and Windows credentials.

Go to File, select Account, and click Sign out.

Launch one of your Office apps and sign out of your account.

If it persists, select the Online repair option.

Hit the Change button and select Quick repair.

Then go to Programs and Features and select your Office package.

Launch Control Panel and select Programs.

Repair your Office package and check the results. If your Office files got corrupted, that might explain why you can’t open Office files in Teams. Hit the Check for updates button and install all the OS updates available for your machine. Speaking of updates, go to Settings, select Update and Security, and click on Windows Update. Install the latest app updates if you’re running an outdated app version.

Click on your profile picture and select Check for updates.

Delete all files from the Teams directory and restart the app.

Type %appdata% in the Windows Search bar and hit Enter.

Right-click Teams in the icon tray and hit Quit.

Close your Microsoft Teams desktop app.

Scroll down and check if the right Office app is selected as the default app for your files.

Navigate to Settings, select Apps & features, and then Default apps.So, check your URL protocol settings and tweak them if necessary.

When you open Office files in the desktop app, Teams uses the URL protocol to open the compatible Office app. Fix: Teams Desktop App Not Opening Files Check Your URL Protocol Settings Or, when users click the file link, Teams says it’s “ Opening” and then “ All done.

No matter how many times they enter their credentials, the “ Sign-in required” alert won’t disappear. For example, the app keeps asking users to sign in.

Ms todo desktop app