Menu
CenturyLink DNS issue blamed for Microsoft 365 services outage

CenturyLink DNS issue blamed for Microsoft 365 services outage

Engineers identified a software defect

A software defect has been blamed for the authentication issue that hit Microsoft 365 services across the globe for three hours on January 30.

According to Microsoft, engineers identified a DNS issue with CenturyLink, an external DNS provider.

In a statement, CenturyLink said its DNS services experienced a disruption due to a software defect, affecting connectivity to a customer’s cloud resources. As a result, DNS services were failed over to an alternative DNS provider to help mitigate the issue.

“We know how important these services are, and worked quickly to restore connectivity,” a CenturyLink spokesperson said.

Microsoft noted the authentication service issues arose on Tuesday, January 29 at 9:15 PM UTC (AEST: Wednesday, January 30, 7.15am) and was eventually resolved three hours later.

Dynamics 365, LinkedIn, and other services that leverage Azure Active Directory (AAD) were also impacted, Microsoft said in a status update, which has spread across Australia, UK, Europe and US.

For customers using Azure Monitor, there was also a period of time where alerts, including service health alerts, didn’t work.

According to Microsoft, services have been moved to an alternate network provider and it has performed numerous targeted service restarts.

In November, Microsoft Office 365 users faced two outages. The first occurred on 19 November, blocking users from logging into their accounts using Multi-Factor Authentication (MFA).

The second outage took place eight days later on 27 November.

At the time, Microsoft said customers using Multi-Factor Authentication (MFA) may experience intermittent issues signing into Azure resources, such as Azure Active Directory, when MFA is required by policy.


Follow Us

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Events

Featured

Slideshows

Channel kicks 2021 into gear as After Hours returns to Auckland

Channel kicks 2021 into gear as After Hours returns to Auckland

After Hours made a welcome return to the channel social calendar with a bumper crowd of partners, distributors and vendors descending on The Pantry at Park Hyatt in Auckland to kick-start 2021.

Channel kicks 2021 into gear as After Hours returns to Auckland
The Kiwi channel gathers for the 2020 Reseller News Women in ICT Awards

The Kiwi channel gathers for the 2020 Reseller News Women in ICT Awards

Hundreds of leaders from the New Zealand IT industry gathered at the Hilton in Auckland on 17 November to celebrate the finest female talent in the Kiwi channel and recognise the winners of the Reseller News Women in ICT Awards (WIICTA) 2020.

The Kiwi channel gathers for the 2020 Reseller News Women in ICT Awards
Show Comments