A Microsoft Azure Consumption Commitment (MACC) allows a company to use its pre-committed Azure spending for eligible third-party solutions available in the Azure Marketplace. This directly addresses the customer's need to use NetApp services without a new, separate budget.

The Pay-as-you-go (PayGo) model allows customers to subscribe to NetApp services directly from the Azure Marketplace, with all charges billed through their Azure account, thus drawing down the MACC. A Private Offer is a customized deal created by NetApp for the customer within the Azure Marketplace, which also enables billing through Azure and qualifies for MACC drawdown. Both models leverage the existing financial commitment with Microsoft.

A. Keystone: Keystone is a Storage-as-a-Service (STaaS) offering billed by NetApp. While it can run in Azure, it is not a direct Azure Marketplace licensing model for leveraging a MACC.

C. BYOL: Bring Your Own License (BYOL) requires the company to have already purchased a license directly from NetApp, which contradicts the "no additional budget" constraint for the software license itself.

1. NetApp Official Documentation, "Get more from your Microsoft Azure Commitment with NetApp": "You can use your Microsoft Azure Consumption Commitment (MACC) to purchase NetApp’s solutions on the Azure Marketplace. ... You can purchase NetApp solutions through the Azure Marketplace using a private offer or a public pay-as-you-go (PAYGO) listing." (This document directly confirms both PayGo and Private Offer as valid methods for using MACC).

2. Microsoft Azure Documentation, "Azure consumption commitment benefit": "Your organization's Azure consumption commitment (MACC) or Azure commit to consume (ACC) includes your spending on all Azure services and select Azure Marketplace offers. ... Eligible Marketplace offers include... many popular solutions from our partners." (This confirms that third-party solutions like NetApp's are eligible to be counted towards a MACC).

3. NetApp BlueXP Documentation, "Licensing for Cloud Volumes ONTAP": This page details the primary licensing models available in cloud marketplaces, listing "Pay-as-you-go (PAYGO)" as a method where "you purchase a subscription to the Cloud Volumes ONTAP software from the cloud provider’s marketplace." This confirms PayGo is a standard marketplace transaction method.