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Microsoft claims that services have resumed following a significant outage that impacted users of Teams and Outlook

After reverting a networking change that rendered some Microsoft 365 services inaccessible to customers on Wednesday morning, Microsoft’s services have since restored.

“We can now attest that the affected services are back online and stable. We’re looking into various issues that might affect the Exchange Online Service “At 14:31 GMT on Twitter, Microsoft said.

Earlier today, Microsoft acknowledged the issue and said it had “rolled back a network modification” that it suspected was to blame, adding that it was continuing to monitor the service while the rollback took effect.

As of October 27, 2010 10:47GMT, Microsoft tweeted: “We’re keeping an eye on the service’s overall recovery, and some users have already reported improvements. To speed up the restoration process, we are also linking the service to new resources.”

At 9 a.m. GMT, Microsoft posted an update on its public service health status dashboard, confirming the severity of the problem and saying it had been linked to a “network configuration issue.”

It is possible that “any user serviced by the compromised infrastructure” may be unable to utilise numerous Microsoft 365 services, the company said.

Teams, Exchange Online, Outlook, SharePoint Online, OneDrive for Business, Microsoft Graph, PowerBi, the M365 Admin Portal, Microsoft Intune, Microsoft Defender for Cloud Apps, and Microsoft Defender for Identity are all affected services.

“The issue has been traced back to a misconfiguration in our network’s settings, and we are now evaluating the most effective means of fixing it without generating any unintended consequences. We’ll update this when we have more information to share “This is what Microsoft stated. Customers trying to connect to Azure resources in Public Azure regions, as well as Microsoft 365 and Power BI, may see network slownessand/or timeouts at 07:05 UTC (07:05 GMT), the firm had warned earlier that morning.

“We’ve tracked down the problem to Microsoft’s WAN and have isolated the issue there (WAN). This has an effect on ExpressRoute connections, datacenter-to-datacenter connectivity, and internet-to-Azure client communication. Consequences from the problem appear to be coming in waves, with the strongest effects occurring every 30 minutes or so. We are now conducting an investigation and will provide updates as they become available.”

In a subsequent update at 09:43:28 GMT, Microsoft indicated the issue was caused by a WAN upgrade: “We have traced the issue back to a recent modification to our wide area network (WAN), and have now reversed the change. Recent telemetry data indicates that many areas and services are beginning to show improvement; we are keeping a close eye on the issue.”

Even though Microsoft announced 2% year-over-year revenue growth to $52.7 billion attributable to improved performing cloud services in its fiscal year Q2 2023 financial update on Tuesday, the company had a cloud outage later that day. Due to slow PC sales and shipments, the industry saw a 19% drop in revenue, to $14.2 billion. Windows OEM revenue fell by 39%. Microsoft reportedly spent $10 billion in OpenAI this week, the company behind ChatGPT, and let go of 10,000 employees.