I tried to enroll my company to Apple Enterprise program, but get message "Cannot enroll in Apple Developer program" I don't know whether to post this on Stack Overflow or on Ask Different. But please try to help. I know this has been asked on this forum, but none of the answers helps my case.

Here's the situation. I work at a software house which has a client that wants to distribute an app in-house (enterprise). This means the client has to create an Apple ID and enroll to the Enterprise program. The client has created the Apple ID and made sure that the age is over 18. But when they tried to apply for the Enterprise program, they get an error "Cannot enroll in Apple Developer program".

I read from Apple's documentation that a D.U.N.S. number is required. But the problem is, I don't see any field where I should put my D.U.N.S. number. Apple just put a big sentence "Cannot enroll in Apple Developer program" without even providing any solution. I read this article that Apple is supposed to "magically" can pull the D.U.N.S. number from D&amp;B for my client company. Is this the case? The main problem for me is that I don't see any field at all to put the D.U.N.S. number, so in this case I'm worried that I overlooked the important thing or settings to input this, so that the verification process can begin to enable the client's company to create Enterprise account.

Can somebody help me? Thanks.
Yes, you can't specify the DUNS number during enrollment. This is part of the 'due diligence' that Apple has to do themselves, in order to verify that you are really representing a company, instead of 'impersonating' one. They might also get in touch with the person you mentioned to have 'legal authority' for this company. 

Basically, with the Enterprise Development Program, you're setting up a legal contract between your company and Apple, and the rules for that are more strict than if you just sign up as an individual.