fix broken link (#12655)

Author: mairaw

docs/framework/security/building-my-first-claims-aware-wcf-service.md

@@ -28,7 +28,7 @@ author: "BrucePerlerMS"
 
 - [Active Directory Federation Services (AD FS) 2.0](https://go.microsoft.com/fwlink/?LinkID=247516)
 
-- [Windows Azure Access Control Service (ACS)](https://go.microsoft.com/fwlink/?LinkID=247517)
+- [Windows Azure Access Control Service (ACS)](https://docs.microsoft.com/previous-versions/azure/azure-services/hh147631(v=azure.100))
 
  AD FS 2.0 is part of the Windows Server R2 and can be used as an STS for on-premise scenarios. Azure Active Directory Access Control (also known as Access Control Service or ACS) is a cloud service, offered as part of Microsoft Azure. For testing or educational purposes, you can also use other STS’s in order to build your claims-aware applications. For example, you can use the Local Development STS that is part of the [Identity and Access Tool for Visual Studio](https://go.microsoft.com/fwlink/?LinkID=245849) which is freely available online.