I have a Microsoft Account which is the same as my company account… normally this works very good and you get to choose which one to use (not right now though and that is why there is no screenshot). At this moment I do not get to choose and I immediately end up on my company ADFS logon page.
To try to get around this I found a link (long live Google) which sends me directly to a page where I log on using Microsoft Account
https://account.windowsazure.com/profile/
Sign in here and then click home and you will be taken to the Azure Portal
/Johan