"Type" old and new passwords into Windows Server 2016 change password screen went WorkSpaces doesn't allow pasting from your Mac.

change_pass.js

#!/usr/bin/osascript -l JavaScript

// Usage:
// export OLDPASS="oldpasswordhere!"
// export NEWPASS="newpasswordgoeshere."
// get to change password screen in WorkSpace prior to running this script and make sure you're on the "old password" field.
// run script without args

var app = Application.currentApplication();
app.includeStandardAdditions = true

var WorkSpace = new Application("WorkSpaces");

var sys_events = Application("System Events");

WorkSpace.activate();
delay(0.2);

var newpw = app.systemAttribute("NEWPASS")
var old = app.systemAttribute("OLDPASS")

array = [old, newpw, newpw]
array.forEach(function(str) {
	for(var i = 0; i < str.length; i++) {
		var c = str.charAt(i);

		switch(c)
		{
			case '0':
				sys_events.keyCode(29);
				break;
			case '1':
				sys_events.keyCode(18);
				break;
			case '2':
				sys_events.keyCode(19);
				break;
			case '3':
				sys_events.keyCode(20);
				break;
			case '4':
				sys_events.keyCode(21);
				break;
			case '5':
				sys_events.keyCode(23);
				break;
			case '6':
				sys_events.keyCode(22);
				break;
			case '7':
				sys_events.keyCode(26);
				break;
			case '8':
				sys_events.keyCode(28);
				break;
			case '9':
				sys_events.keyCode(25);
				break;
			case '.':
				sys_events.keyCode(47);
				break;
			default:
				sys_events.keystroke(str.charAt(i));
		}
		delay(0.1);
	}
	sys_events.keystroke('\t')
	delay(0.1);
})