There is consensus across the industry that the RC4 cipher is no longer cryptographically secure, and therefore RC4 support is being removed with this update. With this change, Microsoft Edge and Internet Explorer 11 are aligned with the most recent versions of Google Chrome and Mozilla Firefox.
To turn on SSL3 in Microsoft Edge or Internet Explorer through settings, follow these steps (be aware that the Microsoft Edge uses the Internet Explorer 11 settings; there is no way to do this in the Edge UI):
Start Internet Explorer.
Go to Internet Options.
On the Advanced tab, select Use SSL 3.0.
Then, follow these steps to modify the registry:
In Registry Editor, locate and then select the following subkey: