Can confirm this is a complete waste of time. After 2 hours of troubleshooting with agent, agent stated there was an investigation open in February on this issue and Quickbooks has decided once the template is in Outlook it is outside of their control. Quickbooks is pointing at Microsoft, so back to the two vendors pointing fingers at each other. 

The only workarounds that work are Offline Cache Mode or to use webmail.

The normal.dat fix no longer works. Also updating Office to the latest patch does not fix issue either.

Very frustrating.