I installed Office 365 and it took a few times to get it right, but when it attempted to sign in to O365, it would simply refresh the sign in page. I installed IE8 and it changed it. Now it opens the sign in screen, but has no boxes in which I can enter my credentials. Normally, I would access it through an enterprise login/single sign on service, so when it detects my work/school account, it takes me to my faculty login page. Before installing IE8, it would go through that process then refresh the final login page. It won't get to the point of asking "work/school" account now as that only shows the background image for the login screen and not the entry boxes.
The apps seem to work fine; appear to be activated. I can work with it this way if nothing else, but I do like being able to share and collaborate on documents, which is really the main reason I'm even looking in to this.
I'm using the latest trial version of Crossover and I'm not sure if that has anything to do with it. The computer is running Ubuntu Budgie 18.04