Update iis/extensions/url-rewrite-module/using-custom-rewrite-provide…

…rs-with-url-rewrite-module.md


Linked to URL Rewrite 2.1 module as has been suggested previously by IIS team's Sam Wu.

iis/extensions/url-rewrite-module/using-custom-rewrite-providers-with-url-rewrite-module.md

@@ -15,7 +15,7 @@ This walkthrough will guide you through how to use custom rewrite providers with
 
 ## Install URL Rewrite Extensibility Samples
 
-In order to complete this walkthrough, download and install URL Rewrite Extensibility Samples. The Extensibility Samples installation package includes .NET assemblies and the source code with full implementation of rewrite providers for the three most common use cases:
+In order to complete this walkthrough, download and install [IIS URL Rewrite 2.1](https://iis-umbraco.azurewebsites.net/downloads/microsoft/url-rewrite). The URL Rewrite Extensibility Samples for 2.0 are no longer available.
 
 - Storing of the rewrite or redirect mappings in a SQL database;
 - Storing of the rewrite or redirect mappings in a text file;