I'm not enthused with the interface either. I have 3 email accounts: (e-mail address removed), (e-mail address removed) and (e-mail address removed). Can only get one account to show in the Windows 10 mail app and I'm not sure about the password thing. Apparently it wants to change my computer logon password which is not set up as a Microsoft account. At first I tried to set up X@hotmail and didn't enter a password. For some reason XX@outlook showed up instead of X@hotmail. I don't want to mess around and have my Windows logon changed from a local account to a Microsoft account. Seems like the Windows mail app has been a bugger to work with since it was introduced.