Following on from an earlier post that explained how to set an activity party list, here is some JavaScript to show how to get an activity party list.
getParty("to"); function getParty(fieldName) { var party = Xrm.Page.getAttribute(fieldName); var members = party.getValue(); for (var i = 0; i < members.length; i++) { // Contact if (members[i].type == 2) { alert("Contact Id-" + members[i].id + " Name-" + members[i].name); } // Account if (members[i].type == 1) { alert("Account Id-" + members[i].id + " Name-" + members[i].name); } // Lead if (members[i].type == 4) { alert("Lead Id-" + members[i].id + " Name-" + members[i].name); } // User if (members[i].type == 8) { alert("User Id-" + members[i].id + " Name-" + members[i].name); } } }