Contacts in the Mac Address Book that are not stored locally on the Mac, but are active in the Apple iCloud, cannot be synchronized. In this case, transfer the contacts to the phone manually or disable iCloud temporary in order to sync with the Gigaset QuickSync.
Disable iCloud on the Mac:
If a message of "keep copy of local contacts" appears, then click "keep contacts". Now the contacts and groups will be available to sync with Sync Services and the Gigaset QuickSync software.
Transferring contacts to the phone: