Microsoft Outlook for iPhone Duo

Microsoft Outlook has no announced version for iPhone Duo. As of October 6, 2026, the current App Store release is version 5.2639.0, from October 5, and its release notes don’t mention the Duo. Microsoft has made no announcement that we have found.

Microsoft has adapted Outlook to folding phones before: on Android foldables it shows the list of emails beside the open message, according to Google’s developer case study. Nothing has been announced for iPhone Duo. AppleInsider’s William Gallagher wrote on September 17 that “firms such as Microsoft and Adobe are famously slow to adapt, because they’re working to their own schedules rather than Apple’s.”

Microsoft Outlook will still open on iPhone Duo, like every app on the App Store. Closed, it looks as it does on any iPhone. Open, it won’t reach the edges of the inner display until Microsoft rebuilds it with Apple’s iOS 27.1 tools, which Apple only cleared for App Store submissions on October 5. The App Store lists an iPad version, so a layout for wider screens exists; nothing says the Duo will get it. More in how apps that aren’t updated run on iPhone Duo.