I have Windows Live Mail currently running on my Windows 10, two hotmail accounts
(this PC > Local Disk (C) > Program Files (x86) > Windows Live > Mail ......
right click wimail.exe, Pin to Start & Pin to Taskbar)
I am also running, Windows Mail app, Calendar app & People app, with both hotmail accounts installed,
& also my Gmail accounts, which could not be added in live mail
(Google just blocked someone from signing into your Google Account (e-mail address removed) from an app [Live Mail]
that may put your account at risk. Less secure app)
so far I have had them running in Tandem while I became accustomed to Windows 10 & the Mail app,
Calendar app & people app,
the Mail app default folders can be adjusted by clicking on Folders or More, right click on folders you reqire to see listed
(click Add to Favourites),
I have : Inbox, Drafts, Sent, Junk, Deleted, Received (clicking on the All Folders +, allows you to add named folders,)
the Calendar app allows me to add calendars from both hotmail & Gmail calendars,
(I currently have UK Holiday & Obsevances & my (e-mail address removed) calendars added)
an improvement on Live Mail calendar, as this does not work for me on Windows 10
the People app works fine also, top left is 'Showing', click on this & you can select which account contacts to show,
adding my 2 hotmail & Gmail accounts created many duplicates, but highlighting a duplicate & clicking 'Link' (3 chain links top of contact details) allowd me to merge the duplicates
I will see how it goes, but most likely I will remove Live Mail in the future