I think the question is fine. 50 is the max. for Ent Ed. No question in that. Just whatever Google search I used to answer the question brought me to the other link I posted and thought the explanation part was either spot on or not so much depending on which BOL reference you happened to look at. Who knows which is correct? Certainly not I.

As with previous posters I couldn't think of a reason why you'd need to many, but I could see the App Service Provider angle. I frankly was just surprised it wasn't based on some binary number, cause really what's the difference between 50 and 64?

-Luke.