We are working with a client that needs to have a field for the phone extension. I thought this would be an easy add. However, when I went to do it, I discovered it does not appear to be so easy. I followed an example in the community posted in the replies to this post...
However, I don't have an extension number. Below is what I did. Is it possible to add an extension number field and have it display? If so, what might I be doing wrong. Any assistance would be greatly appreciated! Client is using 2017 R3. They will not be ready internally to upgrade until next year.

