Please check
http://www.support.xerox.com/support/APP_STUDIO/support/en_US.html?objGUID=6963
"Make sure the username and password for the device is the administrator username and password for the MFD, and make sure that the clocks for both systems are correct."
Trying to publish the Connectkey Contact info app to a 7855, software version 072.040.004.09100. Once I attempt to publish the app I receive "Failed Authentication Exception" or "unable to authenticate user" error. I am using Chrome, and I am logged into the device along with Centerware as an administrator