When you visit a website that requires you to sign in, the new Microsoft Edge will ask if you want your user name and password remembered. The next time you visit the site, the browser will finish filling in your account info. Password saving is turned on by default, but here's how to turn it off:
In Microsoft Edge, select Settings and more > Settings.
Select Passwords, then use the toggle to turn off Offer to save passwords.
This doesn't delete previously saved passwords. To do that, select Settings and more> Settings > Privacy and services > Clear browsing data > Choose what to clear. Next, select Passwords and then select Clear now.