> ## Content Index > Fetch the complete content index at: https://todayfixtech.com/llms.txt > Use this file to discover other available public pages before exploring further. # Microsoft To Do keeps disconnecting: fix sync problems - URL: https://todayfixtech.com/microsoft-to-do-keeps-disconnecting/ - Published: 2026-11-01T04:57:00.000Z - Updated: 2026-11-01T04:57:00.000Z - Author: Md Sojib Mia - Tags: Microsoft, Troubleshooting If Microsoft To Do keeps disconnecting, the usual cause is a bad sign-in session, an expired token, or a sync problem on the device that is failing. Start with sign out and back in, refresh the app, [and check Microsoft account](https://todayfixtech.com/fix-microsoft-365-login-issues/) status before you change anything major. In most cases, those steps restore stable sync without touching your tasks. ## Symptom ```text Microsoft To Do keeps asking you to reconnect, signs you out again, or stops syncing tasks between your phone and computer. ``` Symptom This usually shows up after you open the app, after a password change, after an app update, or after the device has been idle for a while. If the app opens but new tasks do not appear on the other device, that points to sync trouble. If it asks for your password again, the issue is more likely authentication. ## Before you start This applies to Microsoft To Do on mobile and desktop apps that sync with a Microsoft account, including personal, work, and school accounts. You do not need administrator rights for the first checks, but some device-level fixes may require admin access on a managed PC or changes in your phone settings. Do not reset or reinstall anything yet. First, check that the device has a stable internet connection and that your Microsoft account signs in normally in a browser. If you use a work or school account, also check whether Outlook or OneDrive are having the same sign-in problem on the same device. ## What “disconnecting” usually means in Microsoft To Do “Disconnecting” can mean a few different things in Microsoft To Do. You might be signed out again after you just logged in, see a sync error banner, find that new tasks appear on your phone but not your computer, or get prompted to reconnect your account after the app worked normally earlier. The pattern matters. If the app opens but does not refresh your lists, that usually points to sync trouble. If it asks for your password again, the problem is more often account authentication. If only one device is affected, the issue is usually local to that device rather than with your Microsoft account as a whole. A common clue is timing. If the disconnect started right after a password change, a work account policy update, or an app update, that is a strong hint about where to focus first. ## When this is a Microsoft account problem, not a To Do problem Start by checking whether the account itself is healthy. Microsoft To Do depends on the same sign-in session used by your Microsoft account, and that session can stop working even if the app still opens. Use these checks: - If you recently changed your password, any app or device still using the old sign-in token may keep getting rejected until you sign in again. - If you use MFA, a failed approval, a new phone number, or an old authenticator setup can block refresh of the sign-in session. - If you use a work or school account, your organization may have sign-in rules, device compliance requirements, or conditional access policies that interrupt To Do on some devices. - If Microsoft services are having trouble, you may see repeated reconnect prompts on more than one device at the same time. If the same account works in a browser but fails in the app, the account is often fine and the local app session is what needs to be refreshed. If sign-in fails everywhere, focus on the account first, not the app. For a work or school account, it also helps to compare behavior with another Microsoft app on the same device. If Outlook or OneDrive also needs repeated sign-in, the problem is likely account-wide or policy-related rather than specific to To Do. ## The fixes to try first Start with the least disruptive steps. These usually clear a stuck session without changing your data. 1. Check that the device is online and can reach other sites or apps. If your connection is flaky, To Do may look signed in but fail to refresh. Try another app or website first. If that also struggles, fix the network before touching To Do. Expected result: other apps load normally and Microsoft To Do can refresh its lists. If that does not happen, the problem may be with the connection itself rather than To Do. 1. Force close Microsoft To Do and open it again. On a phone, swipe the app away from the recent apps screen. On Windows, close the window fully, then reopen it. Expected result: the app signs in again or reloads your lists. If nothing changes, the app session may still be stuck. 1. Sign out of Microsoft To Do and sign back in. On mobile, open the app settings, sign out, then sign back in with the same Microsoft account. On Windows, do the same from the account or settings area inside the app. Expected result: your lists reappear after the app refreshes. If sign-in keeps failing, the saved token may be expired or invalid, especially after a password change. 1. Update the app. Use the App Store, Google Play, or Microsoft Store to install the latest version. A stale app build can keep old sign-in behavior alive. Expected result: the app opens normally and stops asking to reconnect. If the problem started after an update, the app may need a second launch or a device restart to settle. 1. Restart the device. On a phone, power it off and back on. On Windows, restart the PC rather than just closing the app. Expected result: background sign-in services reload and the app reconnects cleanly. If the issue comes back right after restart, move on to account and device checks. ## If it still disconnects on one device only If Microsoft To Do works on your phone but not your computer, or the other way around, focus on the broken device. That usually means the account is fine and something local is blocking sync. 1. Remove and re-add the account on that device. On Windows, go to the system account area and remove the work or Microsoft account if it is tied to the device profile, then add it back if needed. On a phone, remove the account from the app or device sign-in area, then add it again. Expected result: the device gets a fresh sign-in session. If the device still fails immediately, the saved credentials may still be corrupted or a policy may be blocking access. 1. Clear the app cache where the platform allows it. On Android, app storage settings often let you clear cache without deleting data. On Windows, app repair options may help if the app is installed from the Microsoft Store. Expected result: the app rebuilds temporary data and reconnects. If cache clearing is not available or does not help, continue to the next step. 1. Check background activity and battery restrictions. Phones can stop sync if battery saver, background data limits, or app sleep settings are too strict. Give Microsoft To Do permission to run in the background and use data normally. Expected result: the app stays connected and syncs when not open. If only foreground use works, the OS is probably suspending the app. 1. Reinstall the app only if the problem stays local. Reinstalling is usually safe for synced tasks, but do not use it as the first step. Try sign-out, refresh, and account checks first. Uninstall Microsoft To Do, restart the device, then install it again and sign in. Expected result: a clean app install connects without repeated prompts. If reinstalling does not help, the issue is more likely with the account, device policy, or Microsoft-side sync than with the app files themselves. ## How to confirm the connection is stable again A fix is only real if the app stays connected after normal use. Open Microsoft To Do on one device, create a small test task, then check whether it appears on your other device after a short wait. A healthy result usually looks like this: - The app opens without asking you to reconnect. - Your lists load after a restart without a sign-in prompt. - A new task or a change on one device appears on the other device. - The app stays signed in after closing and reopening it later. If you changed your password, confirm that To Do still works after you sign in on the affected device once more. That matters because some apps reconnect briefly and then fail again when the old token is still hanging around. If the app disconnects again only after sleep, backgrounding, or a long idle period, the fix may still be incomplete. In that case, go back to device restrictions and account reauthentication rather than assuming the app is fixed. ## Why it keeps coming back and how to stop it Repeated disconnects usually come from the same few causes: frequent password changes, multiple Microsoft accounts on one device, background restrictions, or a work or school policy that keeps forcing reauthentication. If you change your password often, expect more token refreshes. After each change, sign out and back in on every device that uses To Do so old credentials do not linger. If you use more than one Microsoft account, keep track of which one owns your task list. Mixing personal and work accounts can make it look like data vanished when the app is really opening the wrong account. If your phone aggressively limits background activity, whitelist Microsoft To Do so it can sync when the screen is off. On a computer, keep the system signed in with the same account you use inside the app. For work or school accounts, policies are outside your control. If the app keeps dropping only on a managed device, the admin may need to check sign-in rules, conditional access, or app permissions. ## Conclusion If Microsoft To Do keeps disconnecting, start with sign out and back in, then check the account and the device that is failing. If it works on one device but not another, focus on local sync limits and saved credentials there. If it fails everywhere after a password change or policy update, the account side needs attention before the app will stay connected. ## Frequently Asked Questions ### Will I lose my tasks if I sign out of Microsoft To Do? Usually no, as long as your tasks are already synced to your Microsoft account. Signing out refreshes the connection; it does not normally erase cloud-stored tasks. ### Why does Microsoft To Do keep asking me to sign in after I changed my password? That usually means one or more devices are still holding an old authentication token. Sign out and back in on each affected device so the app can store a fresh session. ### Why does it only disconnect on my phone or only on my PC? That points to a device-specific issue such as cache, background restrictions, or a local sign-in problem. If the other device works, the account is probably fine.