Have you tried opening a PDF document when you are using a terminal server, but when it opens in Adobe Acrobat Reader DC it doesn’t seem to display, or it prompts you with “There was an error opening this document. Access denied”?

We have a simple tip that should restore the program and allow you to open those documents again.

Step 1 – Acrobat Reader Preferences

Open the Adobe Acrobat Reader DC program (you may find this on your desktop, or in your start items).

Please then press Edit and select Preferences.

Step 2 – Navigate to Security (Enhanced)

When you have opened preferences, you will see a settings pane on the left side with a list of options to choose from. Please select Security (Enhanced). This will prompt you with a page, at the top of which you will see three options. We specifically want to focus on “Enable Protected Mode at Startup”

Step 3 – Untick Enable protected mode at startup

All you need to do is un-tick the box highlighted below.

If you are prompted with a warning window, please press yes..

Now it should look like this:

Step 4 – Close down adobe Acrobat and open A PDF File

Now that his has been un-ticked, please close the dialogue box, and also close down all instances of Adobe Acrobat Reader DC. You should now be able to open PDF files with no problems.