SelectedUserDestination
What can I do here
Here you manage the availability of the user you are logged in with.
Note: Changing the final destination only has an effect if you have set the 'user' in the dial plan or call group of the number.
How it works
Under the user in 'Telephony settings' you can specify different destinations:

Then under 'Availability' you can indicate where you want to be available.
Setting availability can also be done via the Vialer app or the browser plugin