somethign could be found from Hansamanuals: http://www.hansamanuals.com/main/mailnumber___58488/theconf___567/manuals/version___73/langcode___PL/hwconvindex.htm?shortcode=HW0102WIND_Business_Communicator_TAPI
Hi, Paul.
Sounds like you're talking about REST API. And that your are overwriting data with older values if B managed to read record before A finished to update it. Classic conflict resolution ...