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How to Change Default Picture App for Microsoft 365 on Android

Olivia MillerOlivia Miller Oct 12, 2026 870 views

Question details

The user needs to change the default application used to open pictures from Microsoft 365 and OneNote on Android after mistakenly tapping 'Always' on the wrong app.

How to Change the Default Picture App for Microsoft 365 on Android
Product
Microsoft 365 for Android
Device & OS
Android
Scenario
Opening image files and attachments directly within OneNote or Microsoft 365 apps on an Android device.
Observed behavior
Pictures permanently open in the wrong application (such as a sticky-note or scanning app). Reinstalling Microsoft 365 or clearing its app data does not remove the incorrect file association.
Before you start

Check which incorrect app is currently opening your pictures. Knowing the name of the app can allow you to clear defaults for just that specific application instead of resetting your entire device's app preferences.

Solution 1Recommended

Reset All App Preferences via Android Settings

This is the most reliable method to clear stubborn default app associations on Android when reinstalling apps fails to work.

Android manages default applications at the system level. Because the 'Always' command was registered by the Android OS rather than Microsoft 365 itself, uninstalling Microsoft 365 will not clear the association. Resetting all app preferences forces Android to ask you for your preferred app next time.

1
Open Settings

Unlock your Android phone and open the main Settings application from your home screen or app drawer.

2
Navigate to the App List

Tap on 'Apps' (or 'Apps & notifications' depending on your Android version), then select 'See all apps' to view your complete application list.

3
Access the Reset Menu

Tap the three-dot menu icon located in the top-right corner of the screen.

4
Reset Preferences

Select 'Reset app preferences' from the dropdown menu, then tap 'Reset apps' on the confirmation pop-up screen.

5
Restart Device

Restart your phone. The next time you open a picture in Microsoft 365 or OneNote, you will be prompted to choose a viewer. Select your preferred app and tap 'Always'.

Reset All App Preferences via Android Settings
Data Safety Guarantee: Resetting app preferences will not delete your personal data, files, or accounts. It only resets disabled apps, background data restrictions, permissions, and default app associations.
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Frequently Asked Questions

Why didn't uninstalling Microsoft 365 fix my default picture app issue?

When you select 'Always' on an Android prompt, the OS stores this default app association at the system level, not within the Microsoft 365 app itself. Therefore, uninstalling Microsoft 365 or clearing its cache does not remove the association pointing to the wrong picture app.

Will resetting app preferences delete my saved data or log me out?

No. Selecting 'Reset app preferences' only resets your default apps, background data restrictions, permission restrictions, and notification settings. Your personal files, saved data, and login sessions will remain completely intact.

How do I ensure I select the right app after clearing defaults?

Once you clear the defaults or reset app preferences, open a picture in Microsoft 365. Android will present a bottom menu asking which app to use. Carefully select your preferred gallery or photo viewer, tap 'Just once' to test it, and if it works correctly, you can choose 'Always' the next time.