Azure maintenance task degrades ExpressRoute and VPN Gateway across 18 regions: lessons for hybrid cloud
Microsoft reported degraded or disrupted connectivity in ExpressRoute Gateway, VPN Gateway, and Azure VMware Solution across 18 regions, including North Europe, West Europe, and France Central. The company linked the incident to operating system maintenance on its infrastructure.
News summary
On 30 September 2026, from 20:30 UTC, Microsoft alerted ExpressRoute Gateway, VPN Gateway, and Azure VMware Solution users of potential connectivity degradation, outages, and network management failures. According to The Register, the incident affected 18 regions, including North Europe, West Europe, France Central, Germany North, and Switzerland North.
Microsoft stated that it had paused the infrastructure maintenance activity associated with the start of the event, as their investigation showed a correlation with infrastructure operating system updates. Some VPN Gateway instances experienced reduced redundancy rather than total connection loss. In the early hours of 1 October, the company considered the incident mitigated and added Azure Firewall, Application Gateway, and Web Application Firewall to the list of affected products.
The services involved are precisely those that link the office or the data centre to the cloud. When they fail, it is not a specific application that goes down: the very path used by ERPs, virtual desktops, files, and backups is severed. This serves as a reminder that in a hybrid architecture, connectivity is a critical dependency in its own right.
The lesson is not that the public cloud is unreliable, but that no provider is immune to their own operational errors. The companies that fare best are those with a secondary connection path, provider-independent monitoring, and established procedures to continue operating if the primary link degrades.
Source: The Register — 1 October 2026
Frequently Asked Questions
- Was it a cyberattack?
- There is no indication of this. Microsoft linked the incident to maintenance activity on its own infrastructure and announced it would publish further information following their review.
- How can an SME protect itself against cloud connectivity failure?
- Through access redundancy (two connection paths), proprietary monitoring, and a clear procedure for operating in degraded mode. This does not eliminate the risk, but it significantly reduces the impact.
Concepts mentioned in this article: Cloud · Public cloud · Hybrid cloud · Data centre · Redundancy · Backup
If your company operates in a hybrid environment, your cloud link deserves the same level of care as your servers. At Seintec, we design redundant and monitored connectivity between your sites, our data centre, and the public cloud. Speak with our team.
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