Install ARR module and URL Rewrite module
To install the ARR module and URL Rewrite module, please proceed as follows:
Double-click on the Web Platform Installer.
This will open the launch page for the Web Platform Installer.
Type "routing" into the search field.
The search results will be shown.
Select "Application Request Routing 3.0".
Click on "Add".
Click on "Install".
Accept the license terms.
Click on "Finish".
You have installed the ARR and URL Rewrite modules.
Check whether the installation was successful
The ARR and URL Rewrite elements should now be shown in "IIS" area.