New to ProSeries for the 2019 filing season.

I am operating on a Windows 10 64-Bit system.  I have been trying to email password protected PDFs to clients using the print function in ProSeries and have not been able to.  In researching online, I found out that the Outlook and Mail applications on a 64-Bit system will not work w this functionality.  I also found out (although am not certain) that the Thunderbird email application will apparently work even if installed on a 64-Bit system.  Although I have installed this app, I am still unsuccessful.

Does anyone have similar set up (Windows 10, 64-Bit, Thunderbird email app) and is able to use this functionality?  If so, as suggestions on setup or what may be my issue?