Starting with release 1602 the account team members can be synchronized from C4C to R/3.
In R/3 the partner functions are always sales area dependent, therefore the main prerequisite for this feature to work is:
-> you have to maintain your account team members sales area dependent.
This is only possible if your party role is flagged as ‘sales Data dependent’ in the fine tuning for party roles
AND once you have included the sales Area fields in the sales team tab via adaption mode.
please make sure you have the latest PI /HCI content in place in order to get the data correctly mapped into the IDOC segment E1KNVPM