Here is what I have tried sofar.
Using free registry snapshot tool Registry Watch, I have identified the keys HKEY_Local_Machine\software\Microsoft\windows\Currentversion\Installer\Userdata\S-1-5-18\ Products\90401210900063d11c8ef10054038389c\usage\OutlookMapi2
and HKEY_Local_Machine\Software\Microsoft\Cryptography\RNG as changing keys whenever I turn on and off the show this dialog box.
However, both keep changing to completely new values.
If I manually enter the values of these keys to how they were when the dialog box was not displayed, it still keeps displaying the window. So it is not possible to hardcode these keys with a fixed value.
When I turn the dialog box back on, the keys HKEY_USERs\"user"\software\Adobe\Acrobat Reader\9.0\AValert , HKEY_USERs\"user"\software\Adobe\Acrobat Reader\9.0\AValert\cCheckbox are deleted, but when I turn the dialog box off again from within Reader
these keys don't return anymore.....
So it is difficult to pinpoint a specific (set of) key(s) and particular values.
Also disabling and enabling send mail api from within Reader, but this didn't help either (needed for email client to work from Reader in the first place).
Looked for xml's or ini that might change after enabling or disabling the prompt, but none found, neither in my profile, nor all users profile, nor C:\Program Files\Adobe\....
Any feedback wold be much appreciated.