It took a long time for Valve to do this, many features here people have been requesting for a long time. Glad to see it land, at least in Beta for now. It's quite likely the Steam Deck gave Valve a little extra push to do it, as it has been a source of complaints...
a) I travel overseas and even log in from different machines in my own country – the whole POINT of having a hotmail account b) I have set up a hotmail account for a volunteer group – several people want to log in from multiple locations – quite validly – to check for email enqui...