Some users are dropping content into the site willy-nilly. For others, it takes days or weeks to find how to access to anything. The structure is all wrong, making it impossible to find anything. In short, the so-called power user in Office 365, or even on Exchange online, might easily become an IT administrator’s or manager’s worst nightmare.
In a perfect word, a true power user has a near-admin level of access rights, allowing him or her to manage access, add new lists and libraries, and reorganize content. However, the most common mistake made by site admins is misunderstanding permission inheritance and privilege (the concept that rights granted to an object higher up in a hierarchy also apply to the objects below it).