We've experienced the same issue, as well, when composing from an
external drive. Reverting to OS X 10.11.6 seemed to resolve the problem,
for now. Another thing we noticed: the "reveal in Finder" button is
non-responsive within Casper Admin when on ...
The above solution by @pat.best works for us in regards-to forcing
authentication; however, is it possible for the Active Directory user to
log-in to the Wireless Network utilizing their credentials without
validating the certificate? Meaning... Defa...
