Address Book Exclusion from Syncronization

Hi folks,

I use to have several address books on my Zimbra account in order to organize different groups of contacts. For example, all my contacts I used at my former company are stored in a separate address book so that they are not synced to my mobile, but still present in my Zimbra environment. Formerly, I used z-push for synchronization and it worked perfectly to "hide" that folder as a subfolder of the "Emailed Contacts" folder. Igave the zExtras Mobile package a try now, and it silently synchronizes this additional folder with my mobile. Is there a way to exclude that group of contacts from synchronization?

Thanks for your help,

Martin