Fix Missing Outlook Tasks in Microsoft To Do Web App
Question details
Tasks visible in the Outlook mobile app fail to appear in the Microsoft To Do web application due to a synchronization failure.
- Product
- Microsoft Outlook and Microsoft To Do
- Device & OS
- not provided
- Scenario
- Syncing tasks between the Outlook mobile app and To-Do.live.com.
- Observed behavior
- Some or all tasks created or visible in Outlook mobile do not populate on the Microsoft To Do web app.
Verify that your mobile device and computer both have an active, stable internet connection, as offline devices cannot synchronize tasks to Microsoft's cloud servers.
Verify and Match Microsoft Accounts
Mismatched accounts are the most common cause of missing tasks. Ensure both platforms are using the exact same Microsoft login.
Microsoft To Do relies on your Microsoft Exchange account to sync tasks. If your Outlook mobile app is logged into a different default account than your web browser, the tasks will remain segregated.
Open the Outlook app on your mobile device, tap your profile icon in the top left, and note the primary email address listed under settings.
Navigate to To-Do.live.com in your desktop web browser. Click your profile picture in the top right corner to view the currently logged-in Microsoft account.
If the email addresses do not match, sign out of the web application and sign back in using the exact Microsoft account tied to your Outlook mobile app.
Review Task Filters and Clear Browser Cache
Hidden tasks might be filtered out by specific list views, or a stale browser cache could prevent the web app from displaying the latest updates.
Report Persistent Sync Issues to Microsoft
If tasks are still missing after verifying accounts and clearing your cache, the issue may be a backend server bug that needs to be reported.
Manage Your Workflow Smoothly with WPS Office
If ongoing synchronization issues in Microsoft products are disrupting your workflow, consider using WPS Office for your document and productivity needs. WPS Office provides a reliable, all-in-one suite that is completely free and seamlessly handles everyday office tasks.
- 1. Download the Installer: Visit the official WPS Office website and click the free download button for your specific operating system.
- 2. Install the Suite: Run the downloaded installation file and follow the on-screen prompts to set up the software on your computer.
- 3. Open Your Documents: Launch WPS Office and directly open your existing Microsoft Office files without needing to convert them.

Frequently Asked Questions
Why are flagged emails in Outlook not showing up in Microsoft To Do?
Flagged emails will only appear in Microsoft To Do if you have explicitly enabled the 'Flagged email' list. You can turn this on by going to To Do Settings > Smart lists, and toggling 'Flagged email' to on. Also, ensure both applications are using the same Microsoft account.
Does Microsoft To Do sync automatically across all my devices?
Yes, Microsoft To Do is designed to sync automatically across all devices connected to the internet. However, server latency, mismatched accounts, or caching issues can sometimes delay or interrupt this automatic synchronization.
How long does it take for Outlook mobile tasks to appear on the To Do web app?
Under normal conditions, synchronization is nearly instantaneous. If you experience delays, refreshing the web page or completely closing and reopening the mobile app usually forces a manual sync within a few seconds.




