On Thursday 21 April 2016 11:22:10 Alessandro Vercelli wrote:
> Before login in TDM, I selected "Safe Session" and tried login which failed
> (as almost expected); so I selected "TDE" session again and it worked (even
> if I do not why).

Because Safe Session is a non-GUI session, therefore no TDE.  Select TDE and 
you will get TDE as you discovered.

Lisi