Status Page

O365 - Email/Outlook

2025-11-25	Status	Description
10:29 AM		EXCHANGE NOTICE Some users may be unable to search in the Outlook Desktop client and Outlook on the Web Service Degradation User impact: Users are unable to search in the Outlook Desktop client and Outlook on the Web. Current status: The service provider is proceeding to review service monitoring telemetry and support provided information to isolate the root cause and establish a fix. Scope of impact: Impact is specific to some users attempting to search in the Outlook Desktop client and Outlook on the Web.
09:09 AM		EXCHANGE NOTICE Some users may be unable to search in the classic Outlook desktop client Issue ID: EX1189768 Affected services: Exchange Online Status: Service degradation Issue type: Incident Start time: Nov 25, 2025, 6:02 AM AST User impact Users may be unable to search in the classic Outlook desktop client. Scope of impact Impact is specific to some users attempting to search in the classic Outlook desktop client. Current status Nov 25, 2025, 7:56 AM AST We're proceeding to review service monitoring telemetry and support provided information to isolate the root cause and establish a fix. Next update by: Tuesday, November 25, 2025 at 10:30 AM AST

2025-11-21	Status	Description
09:39 AM		EXCHANGE NOTICE Status Service Degradation EX1188132 More info: Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method Current status: Our analysis of provided logs and telemetry indicates that some databases that facilitate Exchange Online mailbox access are experiencing excessive CPU utilization causing some requests to fail, resulting in impact. We're expanding our investigation to identify the specific processes responsible for impact and determine a mitigation strategy.

2025-11-19	Status	Description
03:40 PM		EXCHANGE NOTICE Some users may be unable to send or receive email messages through the iOS Mail app using Exchange ActiveSync (EAS) Service Degradation More info: The impacted users can authenticate without issue, but they receive the error "Cannot Get Mail. The connection to the server failed." when trying to refresh email messages in the Mail app. Current status: The service provider has identified a potential source of impact where a recent HTTP3 configuration change for the QUIC feature in the Exchange Online client access path may be resulting in intermittent mail delivery failures for a limited number of native iOS Mail clients. They’ve disabled this change in the affected environments and are currently requesting impacted users test while they await confirmation that this action has successfully resolved the issue, which would validate their findings.

2025-11-18	Status	Description
09:22 AM		EXCHANGE NOTICE Users may be unable to delete a user from the contact list within Outlook on the web Service Degradation Current status: The service provider has identified that the issue relates to how certain email address formats are being processed. To help them better understand and resolve this, they’ve made changes to improve their diagnostic data and are waiting for these updates to fully apply across the service. This will allow them to obtain more detailed information to isolate the cause of impact and determine the next steps toward a fix.