Microsoft Outlook Mobile adds support for DLP policy tips and enforcement

Updated April 6, 2026: We have updated the timeline. Thank you for your patience.

Introduction

The Outlook Mobile team is updating the release for Data Loss Prevention (DLP) Policy Tips & Override for Outlook Mobile. A number of improvements have been made to the initial scope of this rollout, along with some unforeseen challenges that will be listed in detail.

This message is associated with Microsoft 365 Roadmap ID 496146.

When this will happen

Production Build App Store Release for Android and iOS: We are targeting May 4th to submit to the app store, and on average it can take up to a week for Apple and Google to then distribute that build via the App Stores.

How this affects your organization

The following updates have been made to this DLP rollout for Outlook Mobile:

1. added Custom oversharing dialog support
2. added Custom policy information
3. added Policy tip evaluation performance improvements
4. added Attachment scanning
5. added Intune control for Android and iOS to turn Data Leak Prevention on or off (default is set to OFF)
6. temporarily removed External recipient rule validation

Due to unique challenges with external recipient rule validation we are removing External Recipient rule validation from this release pending changes to the implementation.

After feedback we have added an Intune control that is defaulted to OFF to give your organization the opportunity for validation and user training prior to enabling DLP on Android and iOS. Documentation links for "DLP on Android and iOS" and "Intune controls for DLP in Mobile" will be provided in an update soon.

What you can do to prepare

Please prepare to validate your organization's rules in a test environment prior to enabling Data Leak Prevention on Mobile, and where possible provide training for users which can greatly improve their success and overall experience with policy tips and rules.