Creating custom app: Validate domain that doesn't belong to my org

I’m creating a simple app in the Zoom Marketplace that integrates Zoom Meeting requests with Workday. At the submission step, I’m asked to verify two domains: My org’s and Workday’s domain. Since I do not have access to the Workday DNS (and doubt they would help us with this), the forums and Zoom Support suggest we create a new forum post to validate the domain manually. Please let me know next steps.

Hello,

Thank you for reaching out in relation to Our Domain Validation process, the next steps will be sent to you via DM. Please refer to our domain validation resource: Domain Validation Explanation for any further questions you may have about the process.

Thank you.