Thanks for filling in the details on this. I'd misunderstood twixthecat to mean that the link pointed to the installer EXE or MSI for the printer driver.
I can repro the problem here ... WinKey + R followed by the UNC name of the printer starts the printer install process.
A Run Action Setting in PPT gives me "Powerpoint couldn't locate or start \ServerName\PrinterName.
I copy/pasted the UNC name of the printer from the WinKey+R text box to the Run Program text box in PPT, so there's no question of an incorrect path.
I get the same sort of messages if I try the same UNC path from the command line or from a batch file, so I suspect that the problem originates somewhere below the PPT/application level.
While I usually go all grumpy when one of the MS support people here suggests taking a problem to TechNet, in this case, I think it may be a good idea. That's where you'd find the IT folks who might have an answer or workaround for installing printers to
widespread users.
At the same time, please keep the discussion going here, and let us know if you find anything.
Also, there's this that might be worth looking into:
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/Windows_7/Q_28406551.html
More detail than I had the network background to absorb:
http://blogs.msdn.com/b/7/archive/2011/07/11/allowing-standard-users-to-install-network-printers-on-windows-7-without-prompting-for-administrative-credentials.aspx
And this may be of use:
http://www.tech-recipes.com/rx/45529/install-network-printers-via-batch-file-or-command-line-in-windows-78-and-server-2008/