Hello Selim

If you add this script to the booking page, that will make the last name non-mandatory:

<script>
window.beforeConfirmBookingLoaded = function () {
  let el = document.querySelector("#am-confirm-booking > div:nth-child(1) > form > div.am-confirm-booking-data.el-row > div:nth-child(4) > div > div > div > input");
  el.value = '_';
  el.dispatchEvent(new Event('input'));
  el.parentElement.parentElement.parentElement.style.display = 'none';
}
</script>

That will also hide the last name field from front-end.

I don't have any custom code that would allow you to do this for the employee in back-end. I've reached out to one of our developers about this, and when I hear from him, I will let you know.

Hi again Selim.

Unfortunately, we can't make the same behavior for the employee in back-end. You would need to do it with some custom work, which is not included in the provided support for the plugin.