If you're seeing recurring sign-in errors in To Do on Windows, try these steps to resolve things.

  1. Restart your device, then try to sign back in to To Do.

  2. Disconnect and reconnect your account on Windows (this won’t affect your saved lists and tasks): 

    1. On your Windows 10 PC, navigate to Settings > Accounts > Access work or school.

    2. Select your account, then select Disconnect > Yes > Disconnect.

    3. Select Connect.

    4. Open To Do and try to sign in.

  3. Sign in to Microsoft To Do on the web and make sure that your lists and tasks are up to date. (If they’re not, stop and contact support - this might be a sync issue.) Once you confirm that they're up to date:

    1. Uninstall the To Do app.

    2. Open Settings > Update & Security > Windows Update > Check for updates.

    3. If there are any updates pending, make them. Once they’re finished, restart your device.

    4. Open the Microsoft store app, reinstall To Do, and try to sign back in.

  4.  If none of these steps solve the situation, contact Support at hstodo@microsoft.com.

    Make sure to include:

    1. A screenshot of the error message you saw when trying to sign in to To Do on Windows.

    2. A screenshot showing you were (or weren't) able to sign in to To Do on the web, on Mac, or on iOS or Android. To take the screenshot, try to sign in to To Do anywhere but on Windows. After signing in, open Settings, take a screenshot, and include it in the email you send Support. (If you aren’t able to sign in, you’ll see an error message. Take a screenshot of that and include in the email instead.)

    3. The correlation ID of your sign-in request. To get this, open Windows Search and search for the Event Viewer app. Open Event Viewer, then select Applications and Service Logs > Microsoft > Windows > AAD > Operational. Select the most recent error log, select Error Details, and copy and paste them in your message to Support.

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