If you try to install Office 2013 or Office 2016 products on a system that already has volume license editions of Office, you will receive an error. The problem occurs due to Office products that use conflicting installers. Office 2013 and Office 2016 products use the click-to-run installer whereas volume license editions of Office, like Microsoft Office Professional Plus and Microsoft Office Standard use the Windows installer (MSI).

For details, please refer to the following articles: