Who can answer your customers
Customer messages arrive in your company's customer inbox. The owner can always answer, and so can members the owner has allowed to handle customers. Handling customers is a per-member setting that members do not get automatically. Contractors never see the customer inbox.
Replies go out as your business. The customer sees the company's name and logo, not the person who replied, and the exchange stays in one continuous conversation however many people work on it.
The owner turns customer handling on or off for each member, without changing their role. Give it to the people who speak for the company, and switch it off when that changes.
When someone is removed from the workspace, they lose access to the inbox along with everything else.
The inbox gives the team tools for working together: assignment, statuses, priorities, labels and internal notes.