If the people in the office are treated with an over the counter cream containing malathion and the room is left empty for 72 hours the mites will die anyway,scabies don`t leap about like fleas,they are passed on by close contact then burrow under the skin,none of us are experts mate we just pass our opinions and personal knowledge to each other but like dg says quite rightly get professional advice and cover youself,good luck pal.