[ACS Auth Service - Microsoft Teams WW-Only] REST API Review

New REST API Review meeting has been requested.

**Service Name**: ACS Auth Service - Microsoft Teams WW-Only
**Review Created By**: Pavel Dostal
**Review Date**: 05/28/2025 09:00 AM PT
**Release Plan**: [1739](https://web.powerapps.com/apps/821ab569-ae60-420d-8264-d7b5d5ef734c?release-plan-id=560a7806-4635-f011-8c4e-000d3a3467a5)
**PR**: https://github.com/Azure/azure-rest-api-specs/pull/34712
**Hero Scenarios Link**: [here](https://github.com/Azure/azure-rest-api-specs/pull/34712#issuecomment-2893333981)
**Core Concepts Doc Link**: [here](https://github.com/Azure/azure-rest-api-specs/pull/34712#issuecomment-2893325933)

**Description**: New API for auth users leveraging Teams Phone Extensibility in Azure Communication Services

Teams Phone Extensibility:
https://github.com/Azure/communication-preview/blob/master/Teams%20Phone%20Extensibility/teams-phone-overview.md

Usage of REST API:
https://github.com/Azure/communication-preview/blob/master/Teams%20Phone%20Extensibility/teams-phone-extensibility-access-teams-phone.md

Usage of identifier:
https://learn.microsoft.com/en-us/azure/communication-services/concepts/identifiers?pivots=programming-language-csharp

Detailed meeting information and documents provided can be accessed [here](https://web.powerapps.com/apps/e41c69de-ef96-44ba-b287-0e012e7c13ae?view=edit&event=632a0eae-4835-f011-8c4d-000d3a5b0147)
For more information that will help prepare you for this review, the requirements, and office hours, visit the documentation [here](https://aka.ms/azsdk/onboarding/restapischedule)

Start with PR 34712, then read the linked Teams Phone Extensibility overview, REST API usage, identifier documentation, and review materials. The issue requests a review of a new ACS Auth Service API, but it does not define a newcomer-sized change or explicit completion criteria.

Written by the indexing model from the issue text.