Microsoft stop support for Office 2011 for Mac

Microsoft has fully stopped supporting Office 2011 for Mac. It is also worth noting that Office 2011 may not work properly or at all with macOS High Sierra. If you are having issues with this please feel free to give us a call at 507-529-9600 and we can help assist you in upgrading to Office 365!

Microsofts tech community had a thread about it here