Unplanned Outage - M365 Apple Mail interruptions on iOS devices

<div>Update: As of March 14, 2025, Microsoft has reassessed the incident that interrupted Microsoft 365 Exchange email access in the native iOS mail app on mobile devices. The vendor said as affected users continue taking Microsoft's recommended actions, errors associated with the impact of that incident are reducing so additional remediation efforts within the Microsoft-managed environment are not necessary.<br><br></div><div>Microsoft's recommended actions are to click "continue" when prompted and navigate back to re-enter the password. Customers who aren't prompted but still experience impact should follow the steps in the following link: <a href="https://support.microsoft.com/en-us/office/reconnecting-your-microsoft-3..., the incident began on March 3, 2025 when some CIT customers reported an issue accessing their M365 Exchange<strong> </strong>email messages on the iOS native mail application, Apple Mail, on their mobile devices. The vendor then reverted a standard service update that appeared to be the source of impact and thought the issue was mitigated on their end.&nbsp;<br><br>However, after monitoring the affected infrastructure, the vendor determined the revert was not a viable mitigation strategy. They announced they would begin gathering "logs from a subset of affected users to refine our understanding of impact and formulate our remediation strategy."<br><br>The Outlook app on iOS was not impacted.&nbsp;</div>