Question : GPO not applied Filtering (Uknown reason)

I'm having trouble applying GPO to a user with following message in gpresult.

"   Internet Open Security LVL 1      Filtering:  Not Applied (Unknown Reason) "

This GPO gives more access to Internet Option.

The user is in    "Internet Open Security LVL1 " in AD user group.
Then, the AD user group has Read/Apply permission for the GPO and the AD user group added in Scope/Security Filtering. The GPO is linked to Domain level.

I checked folder permission to the GPO, no problem.

I ran gpupdate /force, no luck.

Any clue?




=============

C:\Documents and Settings\kharnisch>gpresult

Microsoft (R) Windows (R) XP Operating System Group Policy Result tool v2.0
Copyright (C) Microsoft Corp. 1981-2001

Created On 1/6/2010 at 2:23:53 AM


RSOP results for CRCCORP\kharnisch on SUPERVISOR_01 : Logging Mode
-------------------------------------------------------------------

OS Type:                     Microsoft Windows XP Professional
OS Configuration:            Member Workstation
OS Version:                  5.1.2600
Domain Name:                 CRCCORP
Domain Type:                 Windows 2000
Site Name:                   Default-First-Site-Name
Roaming Profile:
Local Profile:               C:\Documents and Settings\kharnisch
Connected over a slow link?: No


COMPUTER SETTINGS
------------------
    CN=SUPERVISOR_01,CN=Computers,DC=CRCCORP,DC=LOCAL
    Last time Group Policy was applied: 1/6/2010 at 2:20:01 AM
    Group Policy was applied from:      pdc_serv.CRCCORP.LOCAL
    Group Policy slow link threshold:   500 kbps

    Applied Group Policy Objects
    -----------------------------
        Default Domain Policy
        GPO For All Workstatins

    The following GPOs were not applied because they were filtered out
    -------------------------------------------------------------------
        Restricted Users
            Filtering:  Denied (Security)

        Content Filtering Off
            Filtering:  Denied (Security)

        Install Software-0
            Filtering:  Not Applied (Empty)

        Internet Open Security LVL 2
            Filtering:  Denied (Security)

        Local Group Policy
            Filtering:  Not Applied (Empty)

    The computer is a part of the following security groups:
    --------------------------------------------------------
        BUILTIN\Administrators
        Everyone
        BUILTIN\Users
        NT AUTHORITY\NETWORK
        NT AUTHORITY\Authenticated Users
        SUPERVISOR_01$
        Domain Computers
        WorkStations


USER SETTINGS
--------------
    CN=Kenneth Harnisch,OU=Training,DC=CRCCORP,DC=LOCAL
    Last time Group Policy was applied: 1/6/2010 at 2:20:01 AM
    Group Policy was applied from:      pdc_serv.CRCCORP.LOCAL
    Group Policy slow link threshold:   500 kbps

    Applied Group Policy Objects
    -----------------------------
        PowerUsers
        Restricted Users
        Default Domain Policy
        GPO For All Domain Users

    The following GPOs were not applied because they were filtered out
    -------------------------------------------------------------------
        Content Filtering Off
            Filtering:  Denied (Security)

        Install Software-0
            Filtering:  Not Applied (Empty)

        Internet Open Security LVL 2
            Filtering:  Denied (Security)

        Internet Open Security LVL 1
            Filtering:  Not Applied (Unknown Reason)

        Local Group Policy
            Filtering:  Not Applied (Empty)

    The user is a part of the following security groups:
    ----------------------------------------------------
        Domain Users
        Everyone
        BUILTIN\Administrators
        BUILTIN\Users
        NT AUTHORITY\INTERACTIVE
        NT AUTHORITY\Authenticated Users
        LOCAL
        ManagerLevelAccess
        Dept-Specialty
        Dispatch Dept
        Internet Open Security LVL 1
        G-Dispatch
        DispatchAccessGroup
        Internet Content Filtering Off
        Training Dept
        Dispatch Supervison

C:\Documents and Settings\kharnisch>

Answer : GPO not applied Filtering (Uknown reason)

To me it looks like the GPO settings for the Group "Content Filtering Off" may be inconflict with any other group associated with a GPO that would enable filtering. That being said, I know nothing about your environment, and this is more of a "best guess' solution.