add deprecation notice

Author: PatrickFarley

articles/ai-services/content-safety/overview.md

@@ -99,6 +99,15 @@ Currently, Azure AI Content Safety has an **F0** and **S0** pricing tier. See th
 
 ## Service limits
 
+> [!CAUTION]
+> **Deprecation Notice**
+>
+> As part of Content Safety versioning and lifecycle management, we are announcing the deprecation of certain Public Preview and GA versions of our service APIs. Following our deprecation policy:
+> * **Public Preview versions**: Each new Public Preview version will trigger the deprecation of the previous preview version after a 90-day period, provided no breaking changes are introduced.
+> * **GA versions**: When a new GA version is released, the prior GA version will be deprecated after a 90-day period if compatibility is maintained.
+>
+> See the [What's new](./whats-new.md) page for upcoming deprecations.
+
 ### Input requirements
 
 See the following list for the input requirements for each feature.

articles/ai-services/content-safety/whats-new.md

@@ -16,6 +16,13 @@ ms.author: pafarley
 
 Learn what's new in the service. These items might be release notes, videos, blog posts, and other types of information. Bookmark this page to stay up to date with new features, enhancements, fixes, and documentation updates.
 
+## October 2024
+
+### Upcoming deprecations
+
+To align with Content Safety versioning and lifecycle management policies, the following versions are scheduled for deprecation:
+* **Effective January 28, 2024**: All versions except `2024-09-01`, `2024-09-15-preview`, and `2024-09-30-preview` will be deprecated and no longer supported. We encourage users to transition to the latest available versions to continue receiving full support and updates. If you have any questions about this process or need assistance with the transition, please reach out to our support team.
+
 ## September 2024
 
 ### Multimodal analysis (preview)