I have an Outlook 2007 user who has recently been given a new workstation running Windows 7 64bit. It also has Adobe Reader XI installed for viewing and printing PDFs.
She is able to preview attached PDF in Outlook without opening the attachment in Adobe Reader but she is unable to print the PDF from the attachment by right clicking the attachment in Outlook and choosing Print from the context menu.
She can print the PDF if she opens the attachment in Adobe Reader but this extra step used to be unnecessary on her old workstation. Her colleague has an identical workstation with the same software and configuration yet the right click > Print works on her colleagues so I think we can rule out a compatibility issue.
I have reinstalled Reader in an attempt to fix it and I have tried running Outlook in safe mode. Neither have proven successful.