One account per person, one bill, and a usage report the person who signed can read.
No single sign-on, no SCIM, and no SOC 2 report. If your procurement needs any of them, say so in the message below - each one gets built when a real customer asks for it, and we would rather tell you that now than during a security review.
Seats, invoicing, procurement paperwork, or anything the plans do not answer.