It doesn't for the most part. But there are a couple of cases where it poses some challenges:
1. Company taxes. As a company, we need to provide proof for any costs we pay. This is usually worked around via intermediaries.
2. Dealing with external customers. If they need to jump on phone calls or video conferences to communicate their strategies, then they will need to identify who they are talking to.
As far as the technical side of things is concerned, we don't even need to know if the person on the other side is a human, an alien, or a smart AI as long as he can get the work done