Before digitally signing a pdf document, you must adjust the settings in Adobe Acrobat Reader as follows:
1
Open Adobe Acrobat Reader.
Select “Edit” at the top and then “Preferences…” at the bottom.
2
Select “Security (Enhanced)”. Uncheck “Enable Protected Mode at startup” and “Enable Enhanced Security”. Confirm by clicking on “OK”.
3
Now the program needs to be closed. Select “File” at the top and “Exit Application” at the bottom of the list.
