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

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

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

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

By Sergiu Gatlan

January 23, 2026
08:34 AM
1

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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Sergiu Gatlan
Sergiu is a news reporter who has covered the latest cybersecurity and technology developments for over a decade. Email or Twitter DMs for tips.

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Comments

ki4rwl - 28 minutes ago

@Sergui - no story on the M365 outage yesterday? JW

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This BleepingComputer article details a recent incident affecting Microsoft Outlook for iOS, specifically version 5.2602.0, impacting iPad users. The core issue stems from a coding error introduced during a tab refresh update, which is causing app crashes and freezes. Microsoft has acknowledged the problem and provided a workaround: launching Outlook while in Airplane Mode, followed by re-enabling Wi-Fi or cellular data. A fix is in development, but Apple’s standard App Store review and release processes mean the updated version may take up to 24 hours to appear.

The incident has been logged as a critical service issue within the Microsoft 365 admin center, indicating a notable user impact. This follows previous, similar issues this week, including an outage impacting Access to Exchange Online and emergency out-of-band updates addressing credential prompt failures across Windows 10, 11, and Server platforms. These updates were necessitated by issues preventing devices with Secure Launch enabled from shutting down or entering hibernation.

Furthermore, the problem echoes a larger trend of Microsoft addressing bugs and vulnerabilities within its mobile applications. The company has proactively released workarounds and is actively developing a permanent solution. The incident highlights the ongoing complexity of managing software updates across diverse operating systems and devices, as well as the critical need for rapid response to user-reported problems, particularly those impacting core productivity tools like Outlook. The article also underscores the importance of Microsoft’s monitoring and incident management processes within its 365 suite. The article provides a snapshot of the quick response initiated by Microsoft to mitigate the impacts of a widespread issue affecting a significant user base. The situation is being tracked and monitored, with the expectation that a final resolution will be made available within 24 hours.