clients copy between groups SEPM 12.1

Hi,

I have a question about copying clients between groups.
Im using SEPM 12.1 and in order to test out the new 12.1 clients im copying old SEP 11 clients to a temp group with a client install 12.1 attachted to it so the can update.

The groups im copying clients from are AD OU groups, so i cant move the clients but i have to copy them.
This works ok, clients is copied to the new temp group, clients goes offline in its imported AD OU group.
Once the client is installed i delete the client from the temp group.
Only the client in the original AD OU group stays offline, how do i get this client back online?

THANKS,

LEVD