If your company is subdivided into various locations, you can, of course, also add your employees to several locations.
How it works:
Click on the layer symbol on the bottom left-hand side in the menu bar → locations → click on the name of the location to which you want to add an employee → click on the green "+" on the top right-hand side

A window will open with the list of all employees on file.
Place a tick next to all the employees that you wish to add to the location.
Click on "Add".
The selected employees have now been added to the location.