This question doesn't look close-worthy at all.
Certainly it solicits the "best" method of accomplishing a reasonably normal Windows system administration task. Though, leaving aside for the moment the less than perfect word choice, this is something that is easily answerable with "facts, references or specific expertise." Best practices are "best" for a reason; while there may be more than one way to solve a problem, experience or the vendor or both will usually suggest one solution is preferred over another. The existence of best practices and/or vendor guidance for a question preclude its being "primarily opinion-based."
Sorry you failed the audit, but it appears that in this case the audit succeeded in its intent: to make sure you were paying attention.
Finally, if I'm not familiar with the subject matter, I would skip the review unless it's blatantly obvious to even a zombie...