disable activesync for new users in emc

hi

activesync was enabled for all and used some scripts to enable it for a special group

but the problem is :

when the support team creates a new user, its activesync is enabled by default

and they use emc not ems (do not want to tell them create users by scripts and cmdlets)

so how can i make activesync disabled for every new user created (we will enable if we like but the default after creation should be disabled)

thanks