Microsoft Apologizes ‘Deeply’ For Worldwide Azure, Teams Outage

Microsoft on Tuesday apologized for a worldwide outage that impacted Azure cloud services including Microsoft Teams, Office 365 and Dynamics 365.

“We understand how incredibly impactful and unacceptable this is and apologize deeply,” Microsoft said in a post-incident review report on the outage, which was the result of “authentication errors” across multiple Microsoft cloud services. “We are continuously taking steps to improve the Microsoft Azure platform and our processes to help ensure such incidents do not occur in the future.”

Microsoft referred in the report to changes made after a Sept. 28, 2020, outage that impacted Microsoft 365 users for five hours.

“In the September incident, we indicated our plans to apply additional protections to the Azure AD (Active Directory) service backend SDP (Session Description Protocol) system to prevent the class of issues identified here.”

Microsoft said the first phase of SDP changes are finished, and the second phase is in a “very carefully staged deployment” that will finish mid-year.