First of all they have a shuttle to take you to the airport or meet you The cab would be able to drive straight up to the office and then exit. We drove straight to the office. The entrance is the first right turn as you pull into the street.
Take the AirTrain(free) from JFK to the Federal Circle stop. Take the free Enterprise shuttle to the rental car lot. Or, take a taxi/Uber from JFK to Enterprise at your own risk. The drivers won't like it because they're missing out on the big fares to the city.
I took an Uber there, and they let him into the gate - he took me all the way to the office doors.
Found out the answer in person, get down at the other end and walk thru the bus entrance, i cudnt find regular entrance, careful while going in
Or the Q10
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