Did the key work?
Seriously tho, who’s bright idea was it to install a downloaded version of software on a business server? If they have a need for the Enterprise version, they should have the money to pay for it. If they wanna be cheap, use a cheaper version that meets their needs or pay for the extra support and get a linux tech to setup a server.
I pose the question to some businesses that you can get a illegal copy and deal with problems later that I will charge by the hour or you can pay the price now and get the software legit and install it.