Some users' calls may fail in Microsoft Teams

Title: Some users' calls may fail in Microsoft Teams User impact: Users' calls may have failed in Microsoft Teams. More info: Specifically, reports from affected users indicated that Public Switched Telephone Network (PSTN) direct routing calls for certain accounts associated with call queues in Microsoft Teams weren't being connected. Additionally, resource accounts and auto attendants associated with these call queues may not have received inbound calls. Final status: We've confirmed that the recent configuration change that managed how phone numbers were processed was responsible for impact, and affected users confirm that impact is remediated after we reverted this change and replaying any changes to phone number that occurred during the window of impact. Scope of impact: Impact was specific to users attempting to make calls to phone numbers that had recently undergone assignment changes in Microsoft Teams. Start time: Friday, October 16, 2026, at 2:12 AM UTC End time: Friday, October 16, 2026, at 4:00 PM UTC Root cause: A recent configuration change that managed how phone numbers were processed was responsible for impact. Next steps: We're reviewing and improving our configuration change procedures to detect and prevent similar issues from occurring again in the future. This is the final update for this event.

Title: Some users' calls may fail in Microsoft Teams User impact: Users' calls may fail in Microsoft Teams. More info: Specifically, reports from affected users indicate that Public Switched Telephone Network (PSTN) direct routing calls for certain accounts associated with call queues in Microsoft Teams aren't being connected. Additionally, resource accounts and auto attendants associated with these call queues may not receive inbound calls. Current status: We've reverted the recent configuration change that relates to how phone numbers are processed and are monitoring to confirm if this change caused the reported impact and if the issue is resolved. Scope of impact: Impact is specific to users attempting to make calls to phone numbers that have recently undergone assignment changes in Microsoft Teams. This information may be updated as our investigation continues. Next update by: Friday, October 16, 2026, at 10:30 PM UTC

Title: Some users' calls may fail in Microsoft Teams User impact: Users' calls may fail in Microsoft Teams. More info: Specifically, reports from affected users indicate that Public Switched Telephone Network (PSTN) direct routing calls for certain accounts associated with call queues in Microsoft Teams aren't being connected. Additionally, resource accounts and auto attendants associated with these call queues may not receive inbound calls. Current status: We’ve reprovisioned the affected resource account-to-phone number association as an initial mitigation. During our investigation, we identified a recent configuration change that may be contributing to the impact. We’re investigating this change to determine whether it’s responsible for the issue. Scope of impact: Impact is specific to users attempting to make calls to phone numbers that have recently undergone assignment changes in Microsoft Teams. Next update by: Friday, October 16, 2026, at 3:30 PM UTC

Title: Some users' calls may fail in Microsoft Teams User impact: Users' calls may fail in Microsoft Teams. More info: Specifically, reports from affected users indicate that Public Switched Telephone Network (PSTN) direct routing calls for certain accounts associated with call queues in Microsoft Teams aren't being connected. Additionally, resource accounts and auto attendants associated with these call queues may not receive inbound calls. Current status: We’ve identified a potential issue with cached information not updating as expected following phone-number assignment changes. We’re reprovisioning the affected resource account-to-phone number association as an initial mitigation and monitoring the results to validate our root cause hypothesis and determine whether additional steps are required. Scope of impact: Impact is specific to users attempting to make calls to phone numbers that have recently undergone assignment changes in Microsoft Teams. Next update by: Friday, October 16, 2026, at 1:30 PM UTC

Title: Some users' calls are failing in Microsoft Teams User impact: Users' calls are failing in Microsoft Teams. More info: Specifically, reports from affected users indicate that Public Switched Telephone Network (PSTN) direct routing calls for certain accounts associated with call queues in Microsoft Teams aren't being connected. Additionally, resource accounts and auto attendants associated with these call queues may not receive inbound calls. Current status: We're continuing to review user-provided service logs and call logs to gain insight into the underlying source of impact and determine our next steps. Scope of impact: Your organization is impacted by this event, and some users making calls in Microsoft Teams are affected. Next update by: Friday, October 16, 2026, at 9:30 AM UTC

Title: Some users' calls are failing in Microsoft Teams User impact: Users' calls are failing in Microsoft Teams. More info: Specifically, reports from affected users indicate that PSTN direct routing calls for certain accounts associated with call queues in Microsoft Teams aren't being connected. Current status: We're reviewing and analyzing user-provided service logs and contextual details to assist with our investigation and determine our next troubleshooting steps. Scope of impact: Your organization is impacted by this event, and some users making calls in Microsoft Teams are affected. Next update by: Friday, October 16, 2026, at 5:00 AM UTC

Title: Some users' calls are failing in Microsoft Teams User impact: Users' calls are failing in Microsoft Teams. Current status: We're investigating a potential issue with Microsoft Teams and checking for impact to your organization. We'll provide an update within 30 minutes.