As I understand it, when Assign Default Organization is enabled, users will always be added to the default organization and when it is disabled users will always be removed from the default organization. I think it may be useful to let users know that this is always the case whether or not users are already in the default organization.

Note: we should probably clarify that the user must be an Organization Admin or a site-wide User Admin.

ref:https://github.com/coder/coder/blob/main/coderd/rbac/roles.go (search forResourceIdpsyncSettings)