Additionally, a separate issue last week caused a widespread authentication failure for customers using Seamless SSO and Microsoft Entra Connect Sync. Microsoft linked that outage to a DNS configuration change. Resolution and Service Restoration As of March 3, 16:53 EST, Microsoft announced that it had identified the root cause of the issue and successfully deployed a fix. "We've identified a recent change that inadvertently caused impact to auto attendant and call queues. We've deployed a fix to restore service," Microsoft stated in an update. Following continuous monitoring, the company confirmed that the affected services have successfully recovered. Users should now be able to make calls through Microsoft Teams and access other Microsoft 365 applications without disruptions. However, Microsoft will provide a full post-incident report detailing the exact cause of the outage and steps taken to prevent similar issues in the future.