Choosing Mail Aliases while automatically signing in on Microsoft Sites

Hello,

Everytime I log on to my Outlook.com account, and go on some other Microsoft Site, like windows.microsoft.com or some other like these, I get automatically signed in(which is a great feature).

I have created a different alias from my personal one for all my newsletter subscribtions and everything. The problem is : I want to sign in through that account(my work account), and not from my personal home one for all the microsoft sites although I have signed in into outlook.com from my primary alias.

How do I do that?

Thanks and Regards.