MC1303717 – M365 Change Digest

One-line summary

Admins can now let users change default compose font name and size in Outlook for iOS and Android by configuring new Intune app keys; feature is off by default, rolling out June 2026.

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Details

Summary

Starting June 2026, administrators can use new Intune app configuration keys to allow or block users from changing the default compose font name and size in Outlook for iOS and Android. By default, user changes remain blocked unless explicitly enabled by administrators.

Body (from Message Center)

[Introduction]

To balance organizational branding with user flexibility, administrators will be able to control whether users can change the default compose font in Outlook for iOS and Android. When a default font name or size is set using Microsoft Intune app configuration policies, new configuration keys will allow administrators to decide if users can modify those defaults.

[When this will happen]

General Availability (Worldwide): We will begin rolling out in early June 2026 and expect to complete by late June 2026.

[How this affects your organization]

Who is affected

Administrators managing Outlook for iOS and Android using Microsoft Intune
Users only if administrators enable user changes

What will happen

Today, when a default compose font name or size is configured through Intune app configuration, users cannot change it.
With this update, administrators will be able to optionally allow users to change:
- The default font name
- The default font size
- Both
Two new Intune app configuration keys will be available:
- com.microsoft.outlook.Settings.defaultFontName.UserChangeAllowed
- com.microsoft.outlook.Settings.defaultFontSize.UserChangeAllowed
By default:
- Both keys will be set to false, preserving existing behavior.
- No changes will occur unless an administrator enables them.
The keys will apply only when the corresponding default font setting is already configured.
If a user changes the font:
- The administrator-configured default will no longer apply for that user.
- Future administrator updates will not override the user’s selection.
- There is no automatic reset to the administrator-defined value.
This feature will be off by default and requires explicit administrator configuration.

[What you can do to prepare]

No action is required to maintain the current locked-font behavior.

Optional (recommended):

Review your Intune app configuration policies for Outlook for iOS and Android.
To allow user changes:
- Set com.microsoft.outlook.Settings.defaultFontName.UserChangeAllowed to true to allow font name changes.
- Set com.microsoft.outlook.Settings.defaultFontSize.UserChangeAllowed to true to allow font size changes.
Update internal documentation or helpdesk guidance as appropriate.

[Compliance considerations]

Question	Answer
Does this change introduce a new administrator control?	Yes. Administrators can control whether users are allowed to change the default compose font name and/or size using new Intune app configuration keys.

Raw JSON (for debugging)

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      "Summary": "Starting June 2026, administrators can use new Intune app configuration keys to allow or block users from changing the default compose font name and size in Outlook for iOS and Android. By default, user changes remain blocked unless explicitly enabled by administrators."
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