Apparently, we had a small misunderstanding in the language of our contract.

The Vendor Code of Conduct team at Microsoft graciously reached out and informed us of the error of our ways. We regret the mistake.

Excerpted.

Subject: Improper use of Microsoft logo and client testimonials

The Microsoft Marks may not be used in any manner that expresses or implies Microsoft’s affiliation, sponsorship, endorsement, certification, or approval of Contractor.

If you would like to see the Microsoft logo, you may go here.