Who can connect or disconnect accounts?
On Free and Founder, you manage your own accounts. On Team, Owners, Admins, and Managers can connect, reconnect, and disconnect accounts for their Brand. Members can see them but can't change them.
Connected accounts belong to one Brand. Switching Brands shows that Brand's accounts.
If you disconnect an account: Posts already published stay on the network. SocialPost can't publish new posts to it until you connect it again.
Related: How does post approval work?