If you're managing a script or application, you should register or check in with the developer credentials listed here. Moreover ensure your User-Agent is just not empty and is one thing unique and descriptive and take a look at yet again. for anyone who is providing an alternate Consumer-Agent string, https://feedbackportal.microsoft.com/feedback/idea/ce0719b2-d0d1-ee11-92bd-000d3a7a5824