Microsoft will discontinue its Outlook Lite email client for Android on May 25, 2026, rendering it unable to access, send, or manage emails, calendars, or attachments. New downloads of Outlook Lite were halted in late 2025. Users are encouraged to transition to the main Outlook app, which offers deeper integration with Microsoft 365, enhanced security, and broader compatibility. Microsoft provides prompts within Outlook Lite to guide users to download Outlook Mobile, ensuring a seamless data migration. Organizations do not need additional administrative actions but may benefit from internal communications regarding the transition.