Open apartments web grid of your object
Choose any accomodation and in the opened window with accomodation click "Share" which is situated on the right from the image of the layout.
In the appeared modal window, click the "Copy" button
Paste the link into the browser bar and delete the apartment id at the end of the line, which is indicated as "&product_id=......". This can also be done in any text editor.
The link remained is a link to your object.