RemoveLeadSourcesForSpecificSecurityRoles = function (executionContext) {
  //get the Source field on the form
	var sourceField = executionContext.getFormContext().getControl("header_source");

	//Lead Sources will be removed for this list of Security Roles
	var secruityRoles = [
		"Manager",
		"TeamLead",
		"RegionalManager"
		];

	//The list of option set items to be removed from Source field for the above Security Roles
	var leadSources = [
		174920000,	//Source1
		174920003,	//Source2
		174920006,	//Source3
		174920010,	//Source4
		174920009   //Source5
		];

	//get logged in User's Security Roles
	var currentUserRoles = Xrm.Utility.getGlobalContext().userSettings.securityRoles;

        //create this matchprevfound variable so that we don't remove option set values multiple times.  Only remove option set values once if a security role matches
        var matchPrevFound = false;

	//get the names of each of the User's Security Roles
	for	(i=0; i < currentUserRoles.length; i++) {
                 Xrm.WebApi.retrieveRecord("role", currentUserRoles[i], "$select=name").then(
                 function success(result) {
                     if (secruityRoles.includes(result.name) && matchPrevFound== false) {
                         matchPrevFound = true;
                         for (i=0; i < leadSources.length; i++) {
                            sourceField.removeOption(leadSources[i]);
                         }
                     }
                 });
	}
}