This document explains how to completely uninstall Office 365.
You may experience issues with Outlook that are often resolved by performing a full uninstall/reinstall of Microsoft Office. Examples of possible errors that could be resolved by fully uninstalling Office 365 include: Inability to open up Office 365 applications, receiving error messages, sporadic issues that result in lack of fully functionality, etc.
Verify version of Office - it is highly recommended you install Office ProPlus version.
Important: If you intend to install Office 365 onto the computer, follow these steps: