microsoft.com
In short: Getting listed on Microsoft Marketplace is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Register in Partner Center and publish your SaaS or Microsoft-integrated offer.
Register in Partner Center and publish your SaaS or Microsoft-integrated offer.
Requires an eligible Partner Center account, offer configuration, testing, and certification.
Open the submission page on microsoft.com and complete its form — that is the "Open submit page" link at the top of this page.
Requires an eligible Partner Center account, offer configuration, testing, and certification.
Priority sets the band — this one is do first. Cost (free) and effort (moderate) move it within that band, which puts it in the highest impact tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.