Here’s a good link . The process doesn’t look that different up until Step 6, but it’s $299 a year to join the Enterprise program, so at that price I hope you’ve got a client already lined up to cover that extra cost. Little steep if you’re just testing what’s possible.
I’m reading the part about exporting (here), it looks pretty straight forward. Sounds like you just pop the .ipa file onto your server and give people a link.