This means that I could have multiple email accounts that I have to use in order to sign into the portal. Using a password manager such as 1Password, not usually a big deal and more of an annoyance rather than a headache.
Within the past month or so, Microsoft has updated the portal to allow me to easily switch accounts. Previously you had to log out of the portal and then log back in.
This is quite convenient. Prior to this change, switching to a different account could goof with other sites I had open (like if I was sending an Outlook e-mail through one account, switching the Azure Portal signed-in account would log me out from Outlook). It’s still not a perfect experience but it’s a lot better.