There are multiple threads about this issue, but none seems to reach a resolution.
My site - https://www.advanced-ict.info - used to rank highly in Bing, with some pages being used as featured snippets at the top of the search results. Now it doesn’t appear at all.
When I look in Bing Webmaster tools it tells me that the sitemap gives an error 403 and other pages fail with error 4xx. Google is unaffected.
There were no firewall events at all on days when the errors occurred (I have a free account, so perhaps I’m not seeing them all?). I added a firewall rule to allow the Bingbots described on the Microsoft website and now there are multiple firewall events to say the Bingbots have been allowed (and all of the IP addresses I’ve checked are verified Bingbot addresses), but Bing Webmaster tools is still saying that Bing is being blocked.
I contacted Bing support and their response is that it’s nothing to do with them.
Is there anything else that I can do?