Microsoft has a subdomain hijacking problem February 18, 2020 https://www.zdnet.com/article/microsoft-has-a-subdomain-hijacking-problem/
Download this update from mybrowser.microsoft.com. Oh, sorry, that was malware on a hijacked sub-domain. Oops Lax DNS leaves door wide open for miscreants to impersonate Windows giant on its own websites March 4, 2020 https://www.theregister.co.uk/2020/03/04/microsoft_subdomain_takeover/ 670+ Subdomains of Microsoft are Vulnerable to Takeover (Lead to Account Takeover)