Greetings, I have an eSignature envelope template with a custom field validation where I have placed your example of a phone number RegEx and it does not appear to be working. I can enter any value and no error is given.
Here is the example you provide:
^>2-9]\d{2}-\d{3}-\d{4}$
Hyphen-separated U.S. phone number, of the form ANN-NNN-NNNN, where A is between 2 and 9 and N is between 0 and 9
at this link Custom Data Validation.

Am I missing something?
Thanks,
David