If you observe “Required” lookup field on an ‘Appointment’ form, you can choose more than one Accounts or Contacts or Users.

Though it looks like a normal lookup field actually it’s a field of type ‘Party list’.

Party List :-

• Party List is a data type in CRM, using which you can set more than one records of an entity for a single field.
• Part List type field, renders as Lookup on the form, but it works as multi select lookup.
• We can’t create a custom party list fields.

For example,

• In the ‘Appointment’ entity field “Required” is a ‘Party List’ type
• We can select multiple records of different type (i.e., Accounts, Users, Contacts…)

Below is Jscript to Get or Set ‘Partylist’

function getPartyList() {

var partyRequired = Xrm.Page.getAttribute(“requiredattendees”);

var attendees = party.getValue();

for (var indxAttendees = 0; indxAttendees < attendees.length; indxAttendees++) {

// User

if (attendees[indxAttendees].type == 8) {

alert(“Attendee is User; Id…