The Order Form is the document that captures the commercial terms of a specific deal under the MSA. It names the products and modules purchased, the user counts or capacity, the unit price and discount, the term and renewal mechanics, and the effective date. It is what gets re-issued every renewal or expansion.
Keeping order forms short is a feature. The MSA covers the durable legal terms; the Order Form should not re-litigate them. The recurring drafting mistake is letting the Order Form slip into MSA territory: a customer's procurement team strikes a clause from the MSA via the Order Form's "additional terms" section, then the next deal has different terms than the last one, and the vendor's account team cannot tell which version applies on renewal.
The clean pattern is to keep MSA edits in the MSA, keep Order Form edits to commercial fields, and use a separate amendment document for anything that genuinely modifies the legal relationship. That gives the legal team one source of truth for what was negotiated, and the sales team one source of truth for what was bought.
Order Forms also carry the signal-versus-noise problem on auto-renewal. The customer expects a renewal notice. The vendor expects an opt-out window. Spelling out both in the Order Form, with concrete dates rather than rolling notice periods, prevents the kind of dispute that lands at general counsel's desk a week before the renewal date.