Following a networking issue, thousands of customers worldwide can once again use Microsoft Teams, Outlook, and other services from the Microsoft 365 suite.

The software developer initially claimed to have "identified a potential networking issue" before rolling back a network modification and checking to see if its services are operational again.

Multiple Microsoft 365 Services Have Been Down Across Users In Europe And Asia

Around 2:30 AM ET this morning, thousands of users across Europe and Asia reported problems with services including Microsoft Teams and Outlook email not loading.

According to Gizmodo, Microsoft discovered the issue was caused by a WAN routing change and put a remedy in place at 4:31 AM ET.

The tech giant cited the following Microsoft 365 services as being impacted by the outage, which lasted approximately four hours: 

• Microsoft Teams

• Exchange Online

• Outlook

• SharePoint Online

• OneDrive for Business

• Microsoft Graph

• Power BI

• Microsoft Intune

• Microsoft Defender

"We've rolled back a network change that we believe is causing impact. We're monitoring the service as the rollback takes effect," the company said on Twitter.

Later, it stated that in order to speed up the recovery process, it has connected the service to additional infrastructure.

Reuters writes that the Microsoft Azure cloud computing platform experienced a networking issue, which in turn caused a number of the company's business programs to go offline.

According to the source, Azure services throughout the Americas, Europe, Asia Pacific, Middle East, and Africa were affected.

Read More: Microsoft Fixes Networking Issue Affecting Multiple Services 

Redmond Has Isolated And Identified The Issue Which Caused The Outage

Following reports of connection problems from users, Microsoft has been looking into the outage that affected numerous Microsoft 365 services.

"We've identified a potential networking issue and are reviewing telemetry to determine the next troubleshooting steps," the Microsoft 365 team claims in a Twitter thread.

The tech giant narrowed the issue down to networking configuration issues, and it has been researching the best mitigation approach to deal with these issues without having a negative impact.

On the Microsoft Azure service status page, the Azure team posted more details about this problem, Bleeping Computer details.

The company discovered that the problem with network connectivity affects devices on the Microsoft Wide Area Network (WAN).

This affects connections made by clients to Azure over the internet, as well as connections made by services in datacenters and through ExpressRoute.

It can be remembered that during the outage, the Microsoft Azure status page, which sporadically shows "504 Gateway Time-out" failures, also had problems loading for some users.

According to the company, during the height of the outage, the problem was impacting users in waves, with peaks happening around every 30 minutes.

However, Microsoft announced at 7 AM ET that the majority of customers could now use its services and that it was still keeping an eye on the services' recovery progress.

The company's status page at 7:30 AM ET showed no issues and claimed that Azure and Microsoft 365 services were both operational.

Related Article: Microsoft Shares Fix For Outlook Login Issues