Acrobat Pro XI 11.0.3 not recognising email client |Adobe Community: "This worked for me (sourced from answers.microsoft.com) ...
1. Create registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\15.0\Outlook
2. Create String value:
Bitness
3. Set the String value for Bitness to:
x64
It resolved an issue wherein AcrobatX could not determine the existence/presence of my "Click to run" instance of Outlook (Office2013).
Setting the bitness value to match my x64 version of Office2013 resolved the issue - I can now use the "Atatch to email" feature in AcrobatX without errors."
'via Blog this'
