Passthrough Issue with pcAnywhere

Windows 2003 Enterprise, SP2 

Citrix XenApp 4.5

Imprivata 4.6.113.95 - single sign on solution

PCAnywhere 11.5.0, build 121

Client connects to a published app, in this case a support folder with shortcuts for pcanywhere sessions.  On one of our servers, it's sending their local user/pw/domain thru into the pcAnywhere session.  Only on one server, others are fine.

Is there a setting that blocks this in pcAnywhere?