M365 Service Health Notification

Skype for Business service alert Incident information Title: Some users unable to receive Skype for Business conferences or Public Switched Telephone Network (PSTN) calls ID: LY218720 Status Service Restored Details Title: Some users unable to receive Skype for Business conferences or Public Switched Telephone Network (PSTN) calls User Impact: Users may have been unable to receive Skype for Business or PSTN calls. More info: In cases where the calls were processed, users may have experienced a delay of up to 30 seconds before receiving Skype for Business and PSTN calls. Final status: Following our system log analysis, we've identified a subsection of networking infrastructure that dropped below our manageable service performance thresholds, preventing users from receiving Skype for Business and PSTN calls. We've rerouted traffic to an alternate subsection of networking infrastructure and confirmed this remediated impact. Scope of impact: Impact was specific to a subset of users who were served through the affected infrastructure. Start time: Thursday, July 16, 2020, at 4:30 PM UTC End time: Thursday, July 16, 2020, at 8:31 PM UTC Root cause: A subsection of networking infrastructure dropped below our manageable service performance thresholds, preventing users from receiving Skype for Business and PSTN calls. Next steps: - We're analyzing performance data on the affected systems to determine why they dropped below service performance thresholds and identify ways to prevent this problem from happening again. This is the final update for the event. Thank you, The Microsoft team To customize what's included in this email, who gets it, or to unsubscribe, set your Service health preferences. If you are receiving this email because your Admin added you as a recipient, please contact your Admin to unsubscribe. Microsoft respects your privacy. Review our online Privacy Statement. Microsoft Corporation One Microsoft Way Redmond, WA USA 98052