Active - ExpressRoute Gateway - Multiple services experiencing connectivity issues in multiple regions

Impact statement: Starting at 20:30 UTC on 30 September 2026, customers using ExpressRoute and/or VPN Gateway may experience degraded or interrupted connectivity. We are also seeing impact to components responsible for managing network gateways, which may affect some management operations. Current status: Our investigation has identified a correlation between the onset of impact and infrastructure operating system servicing activity. During this activity, some network gateway instances became unhealthy or temporarily unavailable. We have paused the associated operating system servicing activity, preventing additional resources from entering the affected servicing workflow. Since taking this action, we are seeing mitigation progress across affected resources, including recovery of impacted ExpressRoute gateways. Affected resources may require time to recover from servicing activity that was already in progress when the pause was applied. Based on the recovery observed so far, we expect recovery to continue and to be durable as the remaining affected resources complete this process. Some supporting network management components are recovering differently, and our engineering teams are continuing targeted restoration work for resources that have not recovered automatically. Our current working hypothesis remains that infrastructure operating system servicing triggered an unexpected condition in some network service instances. We have not yet confirmed the underlying failure mechanism and are continuing to investigate why affected instances became unhealthy and why recovery behavior differs between services. We are closely monitoring recovery across the affected services and regions, validating that recovery is sustained, and taking additional restoration actions where necessary. We will provide additional information within the next 30 minutes or as events warrant.