Admins may have experienced failures when running admin operations the admin portal in Exchange Online

Title: Admins may have experienced failures when running admin operations the admin portal in Exchange Online User impact: Admins may have experienced failures when running admin operations the admin portal in Exchange Online. Final status: We've confirmed that the fix has been successfully deployed and that impact has been remediated. Scope of impact: This event may have impacted any admin attempting to run admin operations through the Exchange Online admin portal, and any admin may have seen failures. Start time: Monday, April 13, 2026, at 10:00 PM UTC End time: Thursday, April 16, 2026, at 3:19 AM UTC Root cause: A recent build update contained a regression to running PowerShell scripts, which resulted in impact. Next steps: - We're reviewing our update procedures to better identify similar issues during our development and testing cycles. This is the final update for the event.

Title: Admins may experience failures when running admin operations the admin portal in Exchange Online User impact: Admins may experience failures when running admin operations the admin portal in Exchange Online. Current status: The fix continues to be deployed to the affected environment and we anticipate its completion by Saturday, April 18, 2026. Scope of impact: This event impacts any admin attempting to run admin operations through the Exchange Online admin portal, and any admin may see failures. This section may be updated as our investigation continues. Start time: Monday, April 13, 2026, at 10:00 PM UTC Root cause: A recent build update contained a regression to running PowerShell scripts, resulting in this impact. Next update by: Saturday, April 18, 2026, at 12:00 PM UTC

Title: Admins may experience failures when running admin operations the admin portal in Exchange Online User impact: Admins may experience failures when running admin operations the admin portal in Exchange Online. Current status: We've confirmed that the fix has started to be deployed to the affected environment and we anticipate its completion by Saturday, April 18, 2026. Scope of impact: This event impacts any admin attempting to run admin operations through the Exchange Online admin portal, and any admin may see failures. This section may be updated as our investigation continues. Start time: Monday, April 13, 2026, at 10:00 PM UTC Estimated time to resolve: Saturday, April 18, 2026 Root cause: A recent build update contained a regression to running PowerShell scripts, resulting in this impact. Next update by: Thursday, April 16, 2026, at 12:00 PM UTC

Title: Admins may experience failures when running admin operations the admin portal in Exchange Online User impact: Admins may experience failures when running admin operations the admin portal in Exchange Online. Current status: We've validated a fix for the issue and are preparing for its deployment to the affected environment. We're aiming to have the fix deployment in progress by the next scheduled update time. Scope of impact: This event impacts any admin attempting to run admin operations through the Exchange Online admin portal, and any admin may see failures. This section may be updated as our investigation continues. Start time: Monday, April 13, 2026, at 10:00 PM UTC Root cause: A recent build update contained a regression to running PowerShell scripts, resulting in this impact. Next update by: Wednesday, April 15, 2026, at 12:00 PM UTC

Title: Admins may experience failures when running admin operations the admin portal in Exchange Online User impact: Admins may experience failures when running admin operations the admin portal in Exchange Online. Current status: We determined that a recent build update contained a regression to running PowerShell scripts, resulting in this impact. We're completing validations on a fix to address this issue and restore impact and will provide an update on its deployment timeline as soon as one becomes available. Scope of impact: This event impacts any admin attempting to run admin operations through the Exchange Online admin portal, and any admin may see failures. This section may be updated as our investigation continues. Start time: Monday, April 13, 2026, at 10:00 PM UTC Root cause: A recent build update contained a regression to running PowerShell scripts, resulting in this impact. Next update by: Wednesday, April 15, 2026, at 8:00 AM UTC