Microsoft 365

Title: Users may be experiencing issues with multiple Microsoft 365 services User impact: Users may experience issues with multiple Microsoft 365 services. More info: The impact to services and functionality includes, but may not be limited to: Microsoft Power BI and Microsoft Fabric - Degraded performance and service unavailability Windows 365 - Some users are unable to connect to their Windows 365 Cloud PCs Microsoft Teams - Notifications pertaining to existing change notification subscriptions, specifically for new messages, message updates and changes in membership, aren't delivering as expected Microsoft Defender for Identity - users may see their update data take time to process, which could result in incomplete information appearing on the identity inventory page. Current status: A portion of infrastructure that supports connectivity for multiple Microsoft 365 services is performing below the expected service threshold. We're attempting to reroute connections to alternate infrastructure to remediate the impact. We anticipate having an update on our mitigation efforts by the next scheduled update time. Scope of impact: This issue may impact any user in the Switzerland region attempting to utilize the impacted services and functionality in the More Info section. Start time: Saturday, September 27, 2025, at 1:03 AM UTC Root cause: A portion of infrastructure that supports connectivity for multiple Microsoft 365 services is performing below the expected service threshold. Next update by: Saturday, September 27, 2025, at 7:00 AM UTC

Title: Potential issues accessing mailboxes via one or more connection methods User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.

Title: Users in Colombia may be unable to access or use Microsoft 365 services User impact: Users in Colombia may be unable to access or use Microsoft 365 services. More info: Impacted services may include Exchange Online and Microsoft Teams. Current status: We're investigating a potential issue with Microsoft 365 and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Admins may see accepted domains not provisioning in Exchange Online after migration User impact: Admins may see accepted domains not provisioning in Exchange Online after migration. More info: Users whose mailboxes are hosted on affected domains may be unable to send or receive email messages until the issue is resolved and the domains are successfully provisioned. Current status: We're investigating a potential issue with Exchange Online and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Some users may be blocked from opening URLs in Exchange Online messages User impact: Users may be blocked from opening URLs in Exchange Online messages. More info: Additionally, admins may receive alerts titled "A potentially malicious URL click was detected involving one user", however the URLs have been confirmed as safe. Current status: We're reviewing provided email messages containing affected URLs to assist in the investigation and determine our next steps. Scope of impact: Any user receiving email messages containing specific URLs may be affected. Next update by: Friday, September 5, 2025, at 8:30 PM UTC

Title: Unable to access multiple Microsoft 365 services in the Brazil region User impact: Users may be unable to access multiple Microsoft 365 services. More info: Users who are able to access Microsoft 365 service may experience latency or degraded feature performance. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 30 minutes. Scope of impact: Impact is specific to a subset of users who are accessing the service from Brazil.