Recently when I have used Bing as a search engine I get multiple warnings like the one below

Alan298

Suspicious connection blocked

25 minutes ago

Feature:

Online Threat Prevention

msedge.exe attempted to establish a connection relying on an unmatching security certificate to wwwbing.com. We blocked the connection to keep your data safe since the used certificate was issued for a different web address than the targeted one.

mkivtt

I'm getting this non-stop as well. It's extremely annoying.

Alexandru_BD

Hello,

This situation is most probably caused by the fact that the website you are trying to access has an expired certificate.

If you do not visit the website and you still receive these notifications, then your browser connects to it either through allowed notifications or toolbars/extensions. I suggest that you clear the cache & cookies, remove any unused/unknown extensions and if the issues persist, reset your browser. You can find these steps here:

https://www.bitdefender.com/consumer/support/answer/2574/

Alternatively, you can add an exception for the website in Bitdefender - Protection - Online Threat Prevention - Manage Exceptions, or, from the same area (Online Threat Prevention) - disable the Encrypted Web Scan feature which scans for the certificates of websites (not a recommended action).

Let me know if this helps.

Stay safe.