Merge pull request #6572 from segmentio/thomas/oauth

Add legacy feature explanation

Author: forstisabella

src/partners/enable-with-segment.md

@@ -4,6 +4,9 @@ title: Enable with OAuth
 
 Enable with OAuth, supported with the [Config API](/docs/api/config-api), allows partners to build seamless flows for customers to implement and enable integrations within their workspace. 
 
+> info "The ability to create new OAuth applications with Segment is no longer available"
+> The "Enable with OAuth" feature is a legacy option, compatible only with Destinations developed on Segment's original developer center. If you're interested in this feature for new Destinations, please let Segment know at [email protected].
+
 ## Concepts
 
 Before getting started with your implementation, it's important to understand the below concepts.