Additional information:
2 Terminal servers
Microsoft Windows Server 2012 R2

Customer opens an attachment from Outlook 2010 and every day the customer needs to choose the default program.

I have tried to save the .pdf attachment locally, right click, choose default program and choosed Adobe Acrobat Reader DC and the .pdf opens. But the problem is when the user log off and login again this setting disappeared so the users needs to choose every day the program to open the .pdf file. When I create a new user account in the same OU there is no problem, problem occurs on existing accounts. Local .pdf files also dont redirected to Adobe Acrobat Reader DC so it seems the default program for .pdf isn't applied but is set in the configuration...

From server level I have configured:

Associate a file type or protocol with a specific program
.pdf is configured for Adobe Acrobat Reader DC

HKEY_CLASSES_ROOT\AcroExch.Document
is configured with EditFlags: 00 00 01 00 (Disabled "Always ask before opening" dialog)

Group Policy
Navigate User Configuration > Preferences > Control Panel Settings then right click on Folder Options and Navigate to New > Open With.. tried this on user level and domain level...

Somebody have a solution?

• Edited by supraindo Monday, June 01, 2015 1:03 PM

This case can be closed.

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\OpenWithList

From this key I can see there is a MRUList with 3 choices. I have created a policy with delete and update and the issue is solved now. When the users log back in the default program is finally Adobe Reader DC and there is no choice popup anymore.

Thanks anyway!

• Edited by supraindo 18 hours 39 minutes ago
• Marked as answer by supraindo 18 hours 38 minutes ago