[RKDinOKC]

Open Calendar or Other Users Folder?
Open Calendar opens the .ics or datafile.
Other User's Folder opens the calendar or inbox of a user in exchange.

Create her profile on a different computer, ie yours. I do this a lot to check on peoples messes.
If you want too keep her password secret you can change it for testing, then have her change it back when done.

I was thinking there may be a local vs public DNS or VPN issue if she drags it home and back.
There is also the HTTP web setting in Outlook for off network connections.

If the calendar has an anonymous setting it shouldn't ask for a login or password.