hi dlee2,
this is sort of confusing for most of us
here is the thing
) Use the default management server (recommended)
Clients wil get updates from the symantec manager, you dont have any schedule that means you cant set a schedule, they will talk to the manager based on heart beat setting which is 5 mins by default. only at that time they will talk and get updates from the manager
You cant set a schedule thats why its grayed out by design
2) Use a LiveUpdate server
2.1->Use the default Symantec Live Update Server
this is by using internet
based on the schedule they will go out and take defs
they will contact to
symante.liveudpate.com
ftp.symantec.com
symantec.com
2.2-> Use a specified internal liveupdate server
if you dont want to use any of the above, you can set your clients from internal liveudpate server
you can install LUadmin from cd2 tools folder of sepm
once set, your clients will take from this server
this is usually for large set of clients who are concerned about bandwith and want to udpate all the symantec products by using just one luadmin
let me know if you have any questions please.