Hello @PL Yap
Thanks for reaching out to us for this issue. Post 10/30 /2020 Customers will not be able to create new Bing Resources as Cognitive Resources, any new resource will need to be created as Microsoft Bing Resource. Existing Bing Search Instances will be supported up to next 3 years. i.e. existing cognitive customers can transition to new Bing Resources any time before that.
I think the document you are referring to is outdate, is this one you are referring to? - https://learn.microsoft.com/en-us/rest/api/cognitiveservices/bingvisualsearch/images/visual-search
I will reach out to the content author to update the document to avoid more confusion, many thanks for reporting this to us.
Regards,
Yutong
Please kindly accept the answer if you feel helpful to support the community, thanks a lot.