If you didn’t install HTTP-Activation for WCF Services, you will get a 404 error when trying to access your service directly.
To be able to run HTTP WCF Services, do as follows:
1. Run Server Manager from your task bar or start menu
2. Choose the server you want to install WCF on
3. Scroll down to “Roles and Features” from task drop down
4. On “Add Role or Feature Wizard” dialog, click down to “Features” in the list of pages on the left
5. Expand “.NET 4.5” – if you haven’t installed it already, go back to “roles” and install it first
6. Under WCF Services” check the box “HTTP-Activation”. You can also add other types (TCP, Named Pipes, etc) if you will need them
7. Click “Install”
