Title: Users may be unable to make outbound Public Switched Telephone Network (PSTN) calls in the new Microsoft Teams client
User impact: Users may be unable to make outbound PSTN calls in the new Microsoft Teams client.
More info: Impact is specific to users who are making outbound PSTN calls in the People App and Live Person card on the new Microsoft Teams desktop client. To avoid this issue, we recommend that users use the dial pad to make calls or switch back to the classic Microsoft Teams desktop client to make outbound PSTN calls as expected.
Additionally, when a user calls out from the People App or Live Person card, the callee will receive two notifications of the inbound call. Clicking on the first inbound call notification will automatically decline the call, making it unable to connect. However, if the callee clicks on the second notification then the call will go through as expected.
Current status: We’ve completed deployment of the previously mentioned fix, and we’re monitoring the service environment to confirm that this action has remediated impact as expected. We recommend affected users restart their Microsoft Teams client to ensure that the fix takes full effect.
Scope of impact: Impact is specific to some users who are making outbound PSTN calls in the People App and Live Person card on the new Microsoft Teams desktop client.
Start time: Friday, October 27, 2023, at 7:42 AM UTC
Root cause: A recent feature update introduced an API code compatibility issue between the classic Microsoft Teams desktop client and the new Microsoft Teams desktop client which is preventing PSTN call functionality from working as expected when making calls from the People App or Live Person card.
Next update by: Friday, February 9, 2024, at 5:00 PM UTC
