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Email Sync Problems

Fix Flagged Outlook Emails Missing from To Do Desktop and iOS Apps

Maira MehtabMaira Mehtab Oct 22, 2026 868 views

Question details

Flagged Outlook emails are not syncing or appearing in the Microsoft To Do desktop and iOS apps, despite showing correctly in the web version.

How to Fix Flagged Outlook Emails Missing from To Do Desktop and iOS Apps
Product
Microsoft To Do
Device & OS
Desktop and iOS
Scenario
Attempting to view flagged Outlook emails as tasks across different devices in Microsoft To Do.
Observed behavior
Flagged emails successfully sync to the To Do web app but remain completely missing from the desktop and iOS application views, even when using the same Microsoft account.
Before you start

Ensure you have a stable internet connection and verify that you are signed in using the exact same Microsoft account (work, school, or personal) for both Outlook and all versions of Microsoft To Do.

Solution 1Recommended

Enable 'Show Completed Tasks' and Verify Account Settings

Since view settings do not sync across devices, you must manually enable completed task visibility on each app to ensure all flagged emails appear.

A common reason for discrepancies between the web app and desktop/mobile apps is that local view settings, such as hiding completed tasks, do not automatically carry over from the web interface.

1
Verify your Microsoft account

Open Microsoft To Do on your desktop or iOS app. Tap or click on your profile picture to verify you are signed in with the identical account used in Outlook.

2
Navigate to Flagged Emails

Locate and open the 'Flagged email' list from the main navigation sidebar in the app.

3
Adjust list settings

Tap the three-dot menu (More options) in the top right corner and select 'Show completed tasks'. You must do this separately on both the desktop and iOS applications.

4
Force synchronization

Pull down on the list in iOS or click the sync button on the desktop to force a refresh. Allow a few minutes for the emails to populate.

Enable 'Show Completed Tasks' and Verify Account Settings
Device-Specific Settings: The 'Show completed tasks' configuration is strictly local. Changing it on the web app will not automatically change it on your phone or desktop.
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Frequently Asked Questions

Why do flagged emails show on the web but not in the Microsoft To Do app?

The web version of Microsoft To Do often updates directly from Exchange servers in real-time. Desktop and mobile apps rely on localized syncs and device-specific settings, like 'Show completed tasks', which do not automatically sync across platforms.

How do I turn on the Flagged Email list in Microsoft To Do?

Open Microsoft To Do, navigate to Settings by clicking your profile icon, scroll down to the 'Connected apps' or 'Smart lists' section, and toggle the 'Flagged email' option to 'On'.

Can I use different accounts for Outlook and To Do to sync flagged emails?

No, the integration requires you to be signed in to both Microsoft Outlook and Microsoft To Do using the exact same Microsoft account (work, school, or personal).