How to implement the EDS process of the company's electronic documents?

Question

Electronic digital signature

Greetings. There is a need to sign Word, Excell, PDF within the company, solely in order to be able to identify the creator of the document. It is clear that you can use all sorts of Crypto PRO, etc., but it either wants a lot of money, or is too crap. Can you advise something?
PS MS Office 2016

Answer 1

https://support.office.com/en-us/article/%D0%94%D0...