Just like in your own business, they are not.
You can easily add and remove team members at any time in Settings - Team members.
You can also temporarily disable an account of a team member by suspending them.
The Vectera team is looking forward to your feedback. Our main goal still is to improve your experience in creating online meeting rooms. Eager to get going? Log into your account or get started with a free, fully-featured trial of Vectera!