“brave.search.com” seems to be blocked by Microsoft Defender Smartscreen.
This affects a large user base within corporations.
Anything we can do to fix this?
Brave Search: https://search.brave.com
Not: brave.search.com
Given your corporate environment, Group Policy might be involved; Brave Support article re Group Policy:
https://support.brave.com/hc/en-us/articles/360039248271-Group-Policy
IF using Brave Browser, you might test in order to discover whether or not, you are able to reach https://search.brave.com via a Brave Browser Private Window with Tor: