maybe someone have experience to call custom action in JavaScript from CRM Online. I tried to follow many articles like this but no luck i just receive error "Internal Serer Error". All this arcticles wtiten for on-promise so i think there is something special for CRM Online. I tried to use my Custom Action from workflow and there is everithing work fine. Thank you for help.
It's hard to make correct SOAP message so i found framework that help me to work with Actions. I tested it and it works fine Call Action in CRM 2015 Easily from JavaScript Library