>Almost 80 percent of licenses canceled

Looks like what IBM tied. IBM allowed some people to stay on Microsoft Office, the 'some people' were VPs and a few 'important' people. That turned into a disaster.

Eventually almost everyone started requesting M/S Office Exceptions, and many were granted. Other people revolted. IBM then gave up and went back to M/S Office.

To do this correctly, convert everyone, from CEO, Board Members down to the lowest level of person. No exceptions.