Now that the linked accounts feature in Outlook.com no longer works how can I manage having multiple account signed in at once?

I have a personal account and a professional one and I juggle between every hour so for me having to sign in and sign out each time is a BIG PROBLEM and unthinkable.

I don't want to have one mail forward to the other as I want each inbox to be completely organized and don't want to mix both sides of my life.

What is the other alternative?

I am aware that in Gmail there is a similar linked account feature, however in order to have them both sign in at once you need to log in both account and after a while they automatically log off. Is there a similar feature on outlook?

Let me know

Sara