Azure status history
This page contains Post Incident Reviews (PIRs) of previous service issues, each retained for 5 years.
From November 20, 2019, this included PIRs for all issues about which we communicated publicly.
From June 1, 2022, this includes PIRs for broad issues as described in our documentation.
October 2021
10/27
SMS MFA not being received by multiple tenants (Tracking ID ZKP4-NSG)
Starting at 10:03 UTC, a subset of customers using SMS for Multi-Factor Authentication in United States are experiencing difficulties signing into Azure resources, such as Azure Active Directory, when Multi-Factor Authentication is required by policy.
Workaround: Customers are recommended to use voice calls or non-telecom authentication methods to complete Multi-Factor Authentication.
Current status: The issue is mitigated as of 13:20 UTC. This issue was due to a 3rd party cellular provider in United States which was experiencing issues, impacting Azure MFA users.