Microsoft's Mobile Device Management policies are setup on all machines by default when Office is installed. While these policies are generally reasonable for University-owned computers, they may not be desired on personally-owned computers. 

Jay has tried emailing Tech Services about this, but hasn't yet found the right person who knows either how to change or remove them.  Fortunately, it's not terribly difficult to fix:

• Click Start, then search for "Edit Group Policy" or "Local Group Policy Editor"
• Navigate to: Computer configuration > Administrative Templates > Windows Components > MDM > Disable MDM Enrollment
  • NOTE: This doesn't remove existing MDM policies, just prevents new ones from being applied
• Remove the "Work or School" Microsoft account (see https://www.onmsft.com/how-to/how-to-manage-personal-work-and-school-accounts-in-windows-10)

The next time you start an Office application, you're likely to get a prompt to log in.  Select the "use for this application only" or "allow my organization to manage my device" - either way, the MDM policies should not be re-applied.