Microsoft recently updated the SLA for Microsoft Teams Calling Plans, PSTN Audio Conferencing and Phone Systems to 99.99% uptime. This change reflects Microsoft’s commitment and confidence in providing a reliable calling experience in Teams.
With this SLA update, Microsoft Teams users will be able to make PSTN calls, dial in to audio conferencing over PSTN, or handle calls using Call Queues or Autoresponders 99.99% of the time. time.
If the uptime of these services falls below 99.99% in a given month, Microsoft will calculate the total downtime and billing service credits based on the duration of the problem (in minutes) multiplied by the number of users that may be affected by the issue.
The source: Microsoft
https://mspoweruser.com/microsoft-sla-teams-calling-plans-phone-system/ Microsoft Updates SLAs for Group Call Plans and Phone System to 99.99% Uptime