Who is the seller of record and how do invoices look when purchasing through Azure marketplace?

Purchasing through Azure marketplace consolidates vendor management and invoicing: you receive a single Microsoft invoice that includes Azure services and marketplace purchases, with presentation depending on your billing account type (EA, MCA, MOSP, or MPA). Microsoft is the billing platform/seller of record; the invoice itemizes the offer and publisher (Progress). For details, see Microsoft’s billing & invoicing overview.