WSUS 3 is a great service you can use to update your current infrastructure servers and workstations
You can use my video to install WSUS 3 server in your environment it is a Microsoft free product.
Here in my demo I configure WSUS server specially for forefront client security server but you can do more in your WSUS server in your network to update other Microsoft product
You can download it from the following link
Microsoft forefront client security - part 4