[IC3 ACS Cross Platform Messaging ] API Review

New API Review meeting has been requested.

**Service Name**: IC3 ACS Cross Platform Messaging
**Review Created By**: Gloria Li
**Review Date**: 01/25/2024 04:00 PM PT
**Onboarding Record**:
**PR**: https://github.com/Azure/azure-rest-api-specs/pull/27405
**Hero Scenarios Link**: Not Provided
**Core Concepts Doc Link**: Not Provided

**Description**: We are hoping to seek your approval for the upcoming GA release targeting February 2024. Outlined below are the key changes we have implemented based on the feedback received:

1. Renaming of models as requested in the recent review meeting:
ChannelType to CommunicationMessagesChannel
TemplateResponse to MessageTemplateResponse
Template Status to MessageTemplateStatus
MessageTemplateBindingsWhatsApp to WhatsAppMessageTemplateBindings
MessageTemplateBindingsWhatsAppButton to WhatsAppMessageTemplateBindingsButton
MessageTemplateBindingsWhatsAppComponent to WhatsAppMessageTemplateBindingsComponent
MessageTemplateValueWhatsAppSubType to WhatsAppMessageTemplateValueSubType
TemplateResponseWhatsApp to WhatsAppMessageTemplateResponse
2. Transition from Swagger to TypeSpec: We have transitioned from Swagger to TypeSpec to describe the CPM service.
3. Addition of Idempotency Header: A new idempotency header has been incorporated to the '/messages/notifications/:send' endpoint.

The adjustments made since the public preview version are minimal, and we are hoping to secure an approval from the board to proceed with the GA release scheduled for February 2024.

Detailed meeting information and documents provided can be accessed [here](https://web.powerapps.com/apps/e41c69de-ef96-44ba-b287-0e012e7c13ae?view=edit&event=17a4e857-b29b-ee11-be37-000d3a3411c3)
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 27405 and the linked API review materials for the IC3 ACS Cross Platform Messaging service. Check the TypeSpec transition, listed model renames, and idempotency header change against the review requirements; done means the API review receives approval for the planned GA release.

Written by the indexing model from the issue text.