Pass Thru of user credentials when using an ICA file

In order for passthru to function correctly when launching an application from an ICA file
the following entries are required in the ICA file and the users APPSRV.INI

ICA File
The ICA file requires the following entries
AutoLogonAllowed=On
UseLocalUserAndPassword=On

APPSRV.INI
The users Appsrv.ini requires the following entries
EnableSSOnThruICAFile=On

Also check ICA setting for prompt for password using MFCFG.EXE

Additional Information
The Appsrv.ini file is deployed into the users profile on first of a pass thru.
Its deployed from ICA client install location (eg. C:\program files\Citrix\ICA xxxx)
so modifying this version of the file will get it deployed to users.
If users have already launched ICA client they will already have the file and be missing the entries.