What's new Kestrel full certificate chain improvements (#27452)

* What's new Kestrel full certificate chain improvements

* What's new Kestrel full certificate chain improvements

Author: Rick-Anderson

aspnetcore/release-notes/aspnetcore-7.0.md

@@ -488,6 +488,10 @@ For more information, see [Shadow copying in IIS](xref:host-and-deploy/iis/advan
 
 ## Miscellaneous
 
+### Kestrel full certificate chain improvements
+
+[HttpsConnectionAdapterOptions](/dotnet/api/microsoft.aspnetcore.server.kestrel.https.httpsconnectionadapteroptions?view=aspnetcore-7.0&preserve-view=true) has a new [ServerCertificateChain](/dotnet/api/microsoft.aspnetcore.server.kestrel.https.httpsconnectionadapteroptions.servercertificatechain?view=aspnetcore-7.0&preserve-view=true#microsoft-aspnetcore-server-kestrel-https-httpsconnectionadapteroptions-servercertificatechain) property of type [X509Certificate2Collection](/dotnet/api/system.security.cryptography.x509certificates.x509certificate2collection), which makes it easier to validate certificate chains by allowing a full chain including intermediate certificates to be specified. See [dotnet/aspnetcore#21513](https://github.com/dotnet/aspnetcore/issues/21513) for more details.
+
 ### dotnet watch
 
 #### Improved console output for dotnet watch