I.e. 2 buildings with the same owner, and all Jews want to carry into the common (for both buildings) enclosed courtyard on Shabos
There are also non-Jewish tenants
Is it enough to rent the reshus (domain) i.e. from the super (employee of the owner, maybe considered like of the tenants) or the secretary of the managment office, or do I need to go to each tenant...?
How is this (renting of the reshus) done practically (what are the customs)?
I saw Shulchan Aruch Orach Chaim 382