Microsoft Finally Bans SHA-1 Certificates In Its Browsers (zdnet.com)
An anonymous reader quotes ZDNet:
With this week's monthly Patch Tuesday, Microsoft has also rolled out a new policy for Edge and Internet Explorer that prevents sites that use a SHA-1-signed HTTPS certificate from loading. The move brings Microsoft's browsers in line with Chrome, which dropped support for the SHA-1 cryptographic hash function in January's stable release of Chrome 56, and Firefox's February cut-off... Apple dropped support for SHA-1 in March with macOS Sierra 10.12.4 and iOS 10.3... Once Tuesday's updates are installed, Microsoft's browsers will no longer load sites with SHA-1 signed certificates and will display an error warning highlighting a security problem with the site's certificate.
It was announced over three years ago (and they gave a year's extension):
https://technet.microsoft.com/en-us/library/security/2880823.aspx
Microsoft may be shite at a lot of things, but one thing they aren't is giving their enterprise customers long-term notice about changes like this.