GUP updates

Hi, and sorry for my english, I'am French ... =)

I have a group (ex: My society\4 - AGENCES\22-St-Alban). This group communicate with Symantec Endpoint Protection Manager (SEPM) by VPN. In this group, I have 10 computers with 1 GUP. I want the GUP will update during the night with SEPM for example, and that customers updates on this GUP the day. The problem is that the GUP uses the same policy that customers.

My question is:

How to make the GUP uses a different policy to its customers ? At least, how to plan its updates at a fix time ?

Thanks, 

Benjamin