Implement auto update versus Zenworks

[ervsplace]

I have inherited a network which is using Zenworks 3.2 to push down updates to approximately 200 clients. I would like to use one of my 2000 servers to set up an internal ftp site which would retrieve the current dat files from nai. I would like the internal clients to point to this ftp and update themselves. I am somewhat confused as to how to go about this, the documentation I inherited mentions Securecast which I believe is discontinued. Can someone point me in the right direction?

Thanks
Dan