right click on group and select update content,
on the client you can run updateconfig
smc -updateconfig ( Refer the below document, what symantec says about updateconfig)
Updates the configuration of the Client by forcing a heartbeat, thus pulling the latest configuration from the Management Server.
Note that this does not always change the "last check-in time" displayed in the SEPM console -- that value changes only when a client's status changes.
Heartbeats do not necessarily cause a status change, so the value of this may not always change.
Available Command-Line Options for Smc.exe
http://service1.symantec.com/SUPPORT/ent-security.nsf/904c88a5602c2de3882573410063493c/d02aafed7241b975802573aa0037fb30?OpenDocument