By default, users and locations can log in and log out of phones. To disable the login/logout feature, lock the user or location to the phone.
To lock a user or location to a phone, follow these steps:

  1. Expand Company Setting and click Users and Locations in the left menu.
  2. Select the user or location to edit the profile. 
  3. For users, check User Locked to Phone(s) in the User Information section.
  4. For locations, check Location locked to phone in the Phone Information section.
  5. Click Save.

To unlock a user or location from a phone, follow these steps:

  1. Expand Company Setting and click Users and Locations in the left menu.
  2. Select the user or location to edit the profile.
  3. For users, uncheck User Locked to Phone(s) in the Phone Information section.
  4. For locations, uncheck Location Locked to Phone(s) in the Phone Information section.
  5. Click Save.