Users may be unable to install Microsoft 365 apps on their Windows device

Title: Users may be unable to install Microsoft 365 apps on their Windows device User impact: Users may have been unable to install Microsoft 365 apps on their Windows device. More info: While we were focused on remediation, users may have been able to download the impacted apps using the following link: https://www.microsoft.com/en-us/microsoft-365/download-office?msockid=198f143bce0564771c06020ccf686598 Final status: We've been alerted to an issue affecting the Microsoft 365apps service in which users may have been unable to install Microsoft 365 apps on their Windows device. Our investigation has determined that a recent configuration change to the components of infrastructure responsible for facilitating Microsoft 365 app installation contained an error that prevented installations from occurring and led to impact. We developed and deployed a fix to resolve this error, and we've monitored our telemetry to confirm that the impact is remediated. Scope of impact: This issue potentially impacted any user attempting to install Microsoft 365 apps on their Windows device. Start time: Tuesday, May 12, 2026, at 9:00 PM UTC End time: Thursday, May 14, 2026, at 4:28 AM UTC Root cause: A recent configuration change to the components of infrastructure responsible for facilitating Microsoft 365 app installation contained an error that prevented installations from occurring and led to impact. Next steps: - We're reviewing our Microsoft 365 apps update and deployment procedures pertaining to the components responsible for facilitating installation to prevent similar impact in future updates. This is the final update for the event.