With Adobe Acrobat version 10 came a new feature called Protected Mode. It was aimed to improve the security of handling PDF files, and it's a great idea. There is a however a 'but'. With protected mode turned on Enterprise Vault FSA customers noticed that they were not able to open archived PDF files from the placeholder left behind after archiving. They would get messages saying 'Access denied' :
A question arose on the Symantec Connect forums the other day about whether Adobe Acrobat 11 exhibits the same issue. The short answer is yes..
Workarounds :
* Disable Protected Mode
* Use a UNC path rather than a mapped network drive
(both per: http://www.symantec.com/business/support/index?page=content&id=TECH154478)
You can get several flavours of Acrobat (full installers too) from: http://www.softpedia.com/progDownload/Adobe-Reader-Download-2572.html