@Michael Fry
Thank you for the post! Since this has to do with Windows ATP and not Azure security center I've removed the "azure-security-center" tag from this thread. Additionally, it doesn't look like Windows ATP is supported on Microsoft Q&A as of right now - for a full list of supported products.
If you'd like to reach out to our Microsoft Defender for Endpoint team (the new name for Microsoft Defender Advanced Threat Protection), please reach out to our experts at their Microsoft Defender for Endpoint Tech Community page.
For more info - Access the Microsoft Defender for Endpoint Community Center
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.