This is yet another way JangoMail provides complete control and flexibility over your data.
API/Web Service users can call either ImportGroupMembersFromData2 or ImportGroupMembersFromFile2 and set the "UpdateOnly" parameter to "True" or "False".
API/Web Service users can call either ImportGroupMembersFromData2 or ImportGroupMembersFromFile2 and set the "UpdateOnly" parameter to "True" or "False".