I have an Incident entity in CRM 2016 that has an ownerID which relates to a User entity. On that User entity, I have a Location field, which is based on a global option set.
On my Incident form, how would I be able to automatically populate a location field, based on the owner that's selected?
If you just need to show the value you can create a Quick View Form and put it on the form.
If you need to copy the value, because it's a lookup, you can create a Workflow that will copy the value when the record is created or reassigned.