For example, there’s no Citation manager in Word Online, but you can add Mendeley, SmartCite, and others. On the plus side, Office Online does include Add-ons, which is quite exciting because many of the missing functions can be added as third-party plugins. That said, none of the Online apps support a Sidebar for layout and navigation. The Tell Me dialogue is also missing in Word, although PowerPoint and Excel both have this handy feature.
