Email Sync Problems

Fix Flagged Outlook Emails Missing from Microsoft To Do

Maira Mehtab Sep 24, 2026 869 views

Question details

The user needs to restore the synchronization between Outlook flagged emails and the Microsoft To Do app.

Product: Microsoft Outlook and Microsoft To Do
Device & OS: not provided
Scenario: Managing tasks and flagged emails across Microsoft productivity applications.
Observed behavior: Flagged Outlook emails are not appearing in the Flagged email list in Microsoft To Do, even though they remain visible in Outlook Tasks and other tasks are syncing properly.

Before you start

Ensure that you are signed into the exact same Microsoft account on both Outlook and Microsoft To Do, and check your internet connection to allow background syncing.

Solution 1Recommended

Review Connected Services and Toggle Flagged Email Settings

Re-authenticating your account and resetting the Flagged Email connection in Microsoft To Do often resolves sync interruptions caused by newly connected apps.

This sync failure frequently occurs after a new third-party service or application is connected to your Outlook account, which can disrupt backend synchronization between Microsoft's own apps.

Access Microsoft To Do Settings

Open the Microsoft To Do application on your device and click on the Settings gear icon, typically located in the top right corner or under your account profile menu.

Toggle the Flagged Email List

Scroll down to the 'Connected apps' or 'Smart lists' section. Find the 'Flagged email' toggle switch, turn it off, wait a few seconds, and then turn it back on to force a reconnection.

Review Connected Applications

Log into your Microsoft account security or privacy page on a web browser. Review any newly connected services or applications that have access to your Outlook account and revoke access for any you no longer need.

Restart Both Applications

Completely close both Microsoft Outlook and Microsoft To Do. Relaunch both applications to initiate a fresh synchronization cycle.

Additional Support: If the issue persists, Microsoft recommends seeking further guidance in the dedicated Microsoft To Do community forum.

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Frequently Asked Questions

Why are my flagged emails showing in Outlook but not in Microsoft To Do?

This discrepancy is usually caused by a background sync disruption. It is often triggered when a new third-party application or service is connected to your Outlook account, which can inadvertently alter permissions or delay sync intervals.

How long does it take for a flagged email to appear in Microsoft To Do?

Under normal conditions, emails you flag in Outlook should appear in the Flagged Email list within Microsoft To Do in just a few seconds to a minute, provided both applications are connected to the internet and signed into the same Microsoft account.

Can I manually force Microsoft To Do to sync with Outlook?

Yes, you can manually trigger a sync in Microsoft To Do. On mobile devices, simply swipe down on your task list. On desktop applications, click the sync icon in the settings or fully close and reopen the application to refresh the data connection.

Outlook & Email Problems