Adobe Reader send email function not working and question about MAPI

Upgraded from Adobe Reader 11 to Reader DC on xenapp6.5 farm with Server 2008R2(64bit) and office (64)

GPO to implement the outlook64bridge registry fix(see below link) has been in place since Adobe Reader 11 was installed.

cannot send email with microsoft outlook 2010 (64 bit) from Adobe ; outlook not recognised as default email client

However, now when the user logs on the HKCU\Software\clients\mail default key is set to outlook64bridge which then points to "C:\Program Files\Microsoft Office\Office14\OLMAPI32.DLL" and Adobe Reader DC is unable to send the email and says default email application is unknown

outlook64bridge reg settings:

DLLPath: C:\Program Files\Microsoft Office\Office14\OLMAPI32.DLL

DLLpatchEX: C:\Program Files\Microsoft Office\Office14\OLMAPI32.DLL

Once I launch outlook then the key HKCU\Software\clients\mail "default" is changed to Microsoft Outlook which then uses the settings in HKLM\Software\clients\mail\microsoft outlook and send as email works until GPO changes the settings back

HKLM\Software\clients\mail\microsoft outlook Settings:

DLLPath: mapi32.dll

DLLpatchEX: C:\PROGRA~1\MICROS~1\Office14\OLMAPI32.DLL

Did something change between Adobe Reader 11 and Reader DC with the way it uses MAPI ? Does Reader DC not need this outlook64bridge workaround ?