Enabling Set Elevator profile for app users allows them to change the profile the app uses when it pre-calls an elevator for them. The person can pick their elevator profile in the app's profile section.
The setting only appears in buildings where elevators are connected to Sharry.
To turn this permission on or off for a specific user, go to People, open the user, open the Permissions tab and use the toggle under Mobile App Permissions. To make it available to a whole company, open the company's Permissions tab and use the toggle under Permissions for App users.
See also Elevator settings in the mobile app manual.