Different update schedule for different group

Hi,

I'm using an SEPM 12.1.3 server to manage over 10k SEP12 and 11 clients through 36 groups.

Clients are dispatch over 100 sites, using at least a GUP by site.

To update contents, we use the SEPM to GUP to client method. No LiveUpdate.

The SEPM server is schedule to retrieve updates from Symantec Liveupdate servers every 4 hours.

My problem is :

We have 1 group from the 36 that can only be update at night (production matter).

We can't change the SEPM server retrieval methode.

For now, we have change the Liveupdate content policy for these particular group by uncheking all contents so the clients from these group won't update.

My question is :

Can we set an update retrieval method for a group? A particular shedule? Or change the Liveupdate content policy in command-line?

Thanks for your help.