MC1276508 – Complete retirement of the Outlook Lite app

Product:

Entra, Microsoft 365 Apps, Outlook, Purview Communication Compliance, Purview Data Loss Prevention

Platform:

Android, iOS, mobile, Online, World tenant

Status:

Change type:

User impact, Admin impact, Retirement

Links:

MC1148534

Details:

Summary:
The Outlook Lite app for Android will be fully retired on May 25, 2026, disabling mailbox access but allowing app launch. Users should switch to Microsoft Outlook Mobile, which supports all mailbox features and compliance capabilities. No admin action is required, but users should be notified to transition.

Details:
[Introduction]
We will complete the retirement of the Microsoft Outlook Lite app on Android on May 25, 2026. As previously communicated in MC1148534, Outlook Lite will be retired as part of our broader effort to reduce overlap and focus development and support on Microsoft Outlook Mobile, our primary mobile email experience. After this change, Outlook Lite will no longer provide functional access to mailbox features.
[When this will happen]
October 6, 2025: New installations of the Outlook Lite app were blocked.
May 25, 2026: Outlook Lite will be fully retired and will no longer provide mailbox functionality for existing users.

Change Category:
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Scope:
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Release Phase:

Created:
2026-04-11

updated:
2026-04-17

Task Type

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Docu to Check

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MS How does it affect me

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MS Preperations

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MS Urgency

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linked item details

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summary for non-techies**

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Direct effects for Operations**

Loss of Mailbox Access
Users will be unable to access their mailbox through the Outlook Lite app, leading to potential disruption in email communication.
   - roles: End Users, Support Staff
   - references: https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749" target="_blank" rel="nofollow noopener noreferrer">https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749, https://support.microsoft.com/office/outlook-for-ios-android-faqs-820ab229-529c-4e41-b227-b5dda358bfd4

Increased User Confusion
Users may be confused about the transition to Microsoft Outlook Mobile, leading to increased support requests and potential frustration.
   - roles: End Users, Support Staff
   - references: https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749" target="_blank" rel="nofollow noopener noreferrer">https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749, https://support.microsoft.com/office/outlook-for-ios-android-faqs-820ab229-529c-4e41-b227-b5dda358bfd4

Disruption of Compliance Features
The retirement of Outlook Lite will disable access to compliance features such as Data Loss Prevention (DLP) that are not supported in the app.
   - roles: Compliance Officers, End Users
   - references: https://support.microsoft.com/office/outlook-for-ios-android-faqs-820ab229-529c-4e41-b227-b5dda358bfd4

Data Management Changes
Users will need to manage their personal data through Microsoft Outlook Mobile, which may require additional training or guidance.
   - roles: End Users, Training Coordinators
   - references: https://support.microsoft.com/office/outlook-for-ios-android-faqs-820ab229-529c-4e41-b227-b5dda358bfd4

Potential Data Access Issues
Users may experience issues accessing their existing email, calendar items, and attachments if they do not transition to Microsoft Outlook Mobile.
   - roles: End Users, Support Staff
   - references: https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749" target="_blank" rel="nofollow noopener noreferrer">https://support.microsoft.com/office/outlook-for-ios-and-android-quick-start-91a3fc25-3ba2-48cc-8257-805fd6892749

Configutation Options**

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Potentional Risks**

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IT Security**

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explanation for non-techies**

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