Artifact Signing Public Trust: is a newly formed US LLC (under 1 month old) eligible for organization validation?

We are a US limited liability company (LLC) formed in October 2026, with a D-U-N-S number, an EIN, a state registration and our own website domain. We want to sign our Windows desktop application with Azure Artifact Signing using a Public Trust certificate, validated as an Organization.

Before we create a paid subscription and an Artifact Signing account, could you confirm:

1. Is a newly formed US organization (under one month old) eligible for Public Trust organization validation, or is a minimum business history required (we’ve seen mention of 3 years)?
2. Which Business Identifier should a US LLC enter in the “New organization validation” form: the EIN, the state entity number, or the D-U-N-S number?
3. If a minimum history is required, is there any alternative path for a new organization (for example, additional documents), or should we use a certificate from a third-party certificate authority instead?

Thank you.