Add to the team.
Grant office access by email. New emails are invited (they sign in with Google to activate); existing clients are promoted in place. Staff = any account with a role — no email-domain restriction.
heads up
Promoting a client who's currently signed in keeps their access on that session until it idles (15 min) or hits the 12-hour cap; new magic links are refused once they hold a role. To cut access immediately, revoke their sessions.