SEPM 11 managing SEP 12 clients.

Hi,

Recently a number of Win7 clients running SEP 12.1 have been introduced to our SEPM 11.0.6300 server. The majority of these clients are not updating their defs. Is this to be expected due to the clients having a newer version than the management server? Is there any particular reason why a small number are updating their defs?

Thanks