austria – Is it legal to recieve a person , who has to quarentine

I live in austria and I have a friend who is a UK citizen , he has to come to austria and has to quarentine(he isnt fully vaccinated). he will quarentine at an apartment I rent(its completely empty no one else lives there for now). but can I meet him at the bus station and direct him to my apartment or better even come with him to the apartment ?