Hello @Frank Chu , Thanks for using Microsoft Q&A platform.
Firstly, try to create a Bing news search service resource by following this documentation: https://learn.microsoft.com/en-us/bing/search-apis/bing-web-search/create-bing-search-service-resource#create-your-bing-resource
Once you have the resource you can copy the either of the Keys and the endpoint from the Bing news search service resource you have created by navigating to Azure portal. Try these and see if that helps.
If you have still face issues. I would recommend you regenerate the keys in the Azure portal as shown in the screenshot.
I hope this helps.
Regards,
Vasavi
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