EXCEPTION(internal_error): An unrecoverable internal error
Last Error: The IWA direct realm encountered an unmapped error code, contact your system administrator.
The context lost portion of the exception is an indication of the domain no longer being able to identify what the authentication request refers to.
Rejoining the proxy to the Windows Domain resolved the issue.
If the issue repeats contact Symantec Network Protection to assist in further troubleshooting this matter.
Note: There are other circumstances where the internal_error exception may appear. Please review the additional related articles below for further information.