Yes I have used the esignature for the business returns. The secret is you have to use a person's name NOT the business name or other wise it will fail.  Using the esignature for the business return is a little different and a bit more work. I used Edoc  as a stand  alone product last year so it was not a problem to do the extra steps.

First you have to have a partner's(shareholder's) name and email address who is going to sign the 8879(P,S, C) The Esignature form has these block empty. You have to type them in your self.

You also have to do a little more work on the form grabbing the date and signature icons from the left and drag them to the line you want to partner(shareholder) to sign on.