Hi there,
to view a PDF file I use the WebBrowser.Navigate command (adding the URL of the PDF file on the network) in a usf in which I have inserted a webbrowser control.
With 32-bit office 2007 it works without problems. On the PC where I have installed 365 64 bit it crashes and closes excel.
With the same command if, instead of pointing to a PDF file, I try to open a website (Default.aspx) it works without problems.