Microsoft Outlook for iOS updates its system requirements to support only the two most recent major versions of iOS, iPadOS, and watchOS. [1, 2]
Key Changes & Requirements
- Minimum OS Requirement: Following major iOS releases (such as iOS 27), the Microsoft Outlook App Store Listing drops official update support for older operating systems like iOS 18 and earlier. [1]
- Impact on Older Devices: Devices stuck on legacy versions (such as iPhone XR, XS, or XS Max running iOS 18 or older) will no longer receive app updates, bug fixes, or new features. While the app may continue to run and sync temporarily, older iterations eventually stop synchronizing mail and calendar data. [1, 2]
- ActiveSync & Native Integration: iPhones and iPads using native Apple Mail or Calendar apps continue to sync Microsoft 365 or Outlook accounts via Exchange ActiveSync, separate from Microsoft's shifting web service protocols. [1, 2]
- Recent Feature Additions: Outlook for iOS includes mobile enhancements like work week calendar views (via landscape rotation or view picker), event drafts, customizable action sheets, workspace booking from location fields, and options to filter or hide
Microsoft Outlook for iOS updates its system requirements to support only the two most recent major versions of iOS, iPadOS, and watchOS