Microsoft has confirmed that many Microsoft 365 services, including Outlook, Sharepoint and Teams, experienced network configuration issues that caused them to be unavailable to users in Europe on Wednesday morning.
On Downdetector, users from Europe, India, and the Middle East reported that Outlook was down. However, at 9:33 GMT, some users in Asia reported that services had been restored.
Microsoft confirmed this in an early update at 9am GMT public service health status dashboard said it was looking for the extent of the problem and its cause with a “network configuration problem”.
“Any user served by the affected infrastructure will be unable to access multiple Microsoft 365 services,” Microsoft said.
Affected services include Microsoft Teams, Exchange Online, Outlook, SharePoint Online, OneDrive for Business, Microsoft Graph, PowerBi, M365 Admin Portal, Microsoft Intune, Microsoft Defender for Cloud Apps, and Microsoft Defender for Identity.
“We have isolated the issue to a network configuration issue and are analyzing the best mitigation strategy to resolve it without further impact. We will provide more information once we have more information,” Microsoft said.
The company warned at 07:05 UTC (07:05 GMT) that customers may experience network latency or outages when trying to connect to Azure resources in Public Azure regions, as well as Microsoft 365 and Power BI.
“We have identified a network connectivity issue occurring on devices across the Microsoft Wide Area Network (WAN). This affects connectivity between clients on the Internet to Azure, as well as connectivity between services in data centers as well as ExpressRoute connections. The issue causes ripple effects and affects nearly every It peaks every 30 minutes. We are actively investigating and will share updates as more is known.”
In a further update at 09:43:28 GMT, Microsoft said the problem was caused by a WAN update: “We have identified a recent WAN update as the likely root cause and have taken steps to roll back that update. Our latest telemetry shows signs of recovery in many regions and services and we continue to actively monitor the situation.”
The Microsoft cloud outage comes after the fiscal year Q2 2023 earnings update, where revenue grew 2% year over year to $52.7 billion thanks to stronger cloud services. Personal computing revenue fell 19% to $14.2 billion due to sluggish PC sales and shipments. Windows PC revenue fell 39%.