I have 3 Microsoft accounts. One for work, one for school and a personal account. In the outlook app on my phone, these accounts work together seamless, no problem there. But, on my chromebook, where I use the online version of office 365 it is a whole different story. Everytime I switch to another office 365 environment, I have to login, fill in the email, password, and click the button saying 'stay logged in?'. This takes up a lot of time.
Make a landing page where I can login with all my accounts. Remember my accounts on the device I work on. Make it easy to switch between environments. Do not make me have to log in everytime I switch between documents for different organizations. Make my life easier, not harder.