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 enterprise/subscription version of Office.

Uninstall Office

• Uninstall Office for Windows
• Uninstall Office for Mac

Important: If you intend to install Office 365 onto the computer, follow these steps:

1. Remove credentials - "Reset/Remove your account credentials from within your OS" section.
2. Install Office 365 - download/install.