I'm currently facing this issue where a user logs on sets Adobe Reader as default PDF reader but as soon as they log off the default reader sets back to Microsoft Edge. I've tried forcing the Adobe reader through GPO and still have't had any luck. Also tried to delete the PDF file association from the registry which it would not allow me to delete even though I had administrator access. Would anyone be able to assist me with this issue. Could it be something to do with the master build may need altering?
S S Bussan