Microsoft is ending an Outlook app that you may not have heard about, but may have used, if you knew about it

Microsoft continues to retire some of its applications and products. Just recently, Microsoft announced the retirement of OneNote for Windows 10, its Android and iOS app Microsoft Lens PDF Scanner, and the end of its Movies and TV store on Windows and Xbox.

Regarding Outlook, its email service and application, it continued to push the new Outlook. While classic Outlook remains until at least 2029, the classic Mail and Calendar apps were migrated to the new Outlook experience already.

Now, Microsoft announced that it will retire another Outlook app. Called Outlook Lite, it was designed as a lightweight Outlook app for mobiles, especially older devices with low performance. Released originally in 2022, it promised a fast startup and less battery consumption compared to the regular Outlook application. Downside was that certain features were not supported by the lite application. You could not connect your Gmail account, for instance. File storage services such as Dropbox or Box, and Microsoft Exchange Server, were also not supported by the lite application.

Outlook Lite was available in certain regions only. Users from those regions could install the application via the official application stores. Those from other regions could use workarounds to install the application unofficially on their devices.

Millions of users downloaded and installed the Outlook Lite application. Starting October 6, 2025, Microsoft will block new installations of the Outlook Lite application. Existing users may continue to use the app "for a limited time", but it will eventually be retired fully.

Microsoft does not reveal dates in the announcement. It is unclear therefore, when the app will stop working for existing users. The company recommends that existing users migrate to the regular Outlook for Mobile application on their devices to continue checking Outlook emails on their devices. However, this comes at the cost of increased battery usage and performance requirements.

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