Ideas, Conventions and Techniques for Microsoft Business Office 365
https://nova-wiki.win/index.php?title=Obtain_the_Scoop_on_Microsoft_Office_365_Ahead_of_You're_Far_Too_Late
Because it is backed by Microsoft no less, it has an iron-clad security. In print in the base of the options' demo page, Microsoft said that the additional space would not be accessible to just about every user