Recently I upgraded one of my machines only to find out that some Outlook plugins that I need were incompatible.
The 2010 edition still installed wasn’t functioning properly, so I also removed the recent 2016 upgrade only to find out that everything I did resulted in this error
“NOT IMPLEMENTED” or “CANNOT SAVE, NOT IMPLEMENTED” basically my email was broken, my calendar was broken I couldn’t do anything.
The MAPI upgrade from Office 2016 remained after uninstall.
Go to this folder
C:\Program Files (x86)\Microsoft Office\Office15
Delete / Rename OLMAPI32.DLL (Remember you have to be admin)