Microsoft: Outlook for iOS crashes, freezes due to coding error

Microsoft confirmed today that Outlook mobile may crash or freeze when launched on iPad devices due to a coding error.

While this known issue may affect all users of Outlook for iOS version 5.2602.0 on an iPad, Microsoft says that they can work around it by launching Outlook after enabling Airplane Mode.

“The latest Outlook for iOS update contains a code error related to a change meant to refresh rather than restart tabs when feature flags are updated, which is resulting in this impact,” Microsoft said in an incident report (tracked under EX1220516).

“Affected users can launch Outlook mobile while in Airplane Mode and then re-enable Wi-Fi and/or cellular data as a way to circumvent impact while we work towards mitigation.”

Microsoft added that it has already developed a fix for this bug, but the fixed app version may take up to 24 hours to reach the App Store due to Apple’s review and release processes.

While Microsoft has yet to detail how many users are impacted by this ongoing issue, it has been flagged as an incident in the Microsoft 365 admin center, a tag commonly applied to critical service issues with noticeable user impact.

This week, it also shared a temporary workaround for users experiencing Outlook freezes after installing the January 2026 security updates on Windows 11, Windows 10, and multiple Windows Server platforms (including Windows Server 2025, Windows Server 2022, and Windows Server 2019).

Over the weekend, Microsoft released emergency out-of-band updates for Windows 10, Windows 11, and Windows Server to fix credential prompt failures affecting remote connection apps and preventing devices with Secure Launch enabled from shutting down or entering hibernation.

Microsoft is also actively working to mitigate another known issue (EX1221742) that prevents Exchange Online customers in the United States, France, and the United Kingdom from accessing their email accounts via Outlook on the web.

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