Is Adobe Sign a part of creative cloud subscription?

My company has Creative Cloud enterprise subscriptions. Some for the full Creative Cloud suite of apps and a few for Acrobat Pro only.

I was just asked by the company owner if we can digitally sign documents, like using something like DocuSign. I have digitally signed documents with Acrobat Pro. But I'm not sure if it is considered a certified signature? Is it basically the same thing as DocuSign? Or do we also have to have a separate Adobe Sign plan for signatures to be certified?