Microsoft s Internet Explorer and Edge browsers officially ending support for the SHA-1 hash function. Both browsers will block webpages signed with a SHA 1 SSL certificate from loading and users will be shown a warning about an invalid certificate. Experts have warned users for close to a decade that the hash function was theoretically broken. In February, researchers from Google and the Cryptology Group at Centrum Wiskunde and Informatica (CWI) published a paper called SHAttered that described the first such attack.
Source: https://threatpost.com/microsoft-makes-it-official-cuts-off-sha-1-support-in-ie-edge/125579/