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Windows Server 2012 Group Policies and Policy Management : GPO Administrative Tasks - Troubleshooting Group Policies

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10/23/2013 1:52:50 AM

1. Group Policy Modeling Operations

The GPMC has a function called Group Policy Modeling that enables administrators to run tests to determine the projected outcome of GPO processing. Group Policy Modeling allows administrators to test the outcome of applying new GPOs, changing the status of GPOs, changing the location of a computer or user object, or changing the group membership of a computer or users.

2. Troubleshooting Group Policies

Group Policy administration also requires the ability to report and troubleshoot Group Policy processing.

Managing Group Policy Logging and Tracing

When group policies are not processing as intended, it may become necessary to enable logging to decipher where the issues are occurring. Before logging and tracing defaults are changed, it is important to note that logging for warnings and errors is enabled by default for all extensions. Changing logging and tracing behavior should be done only if the information stored in the event logs on the affected system are not sufficient for determining the cause of the GPO processing issues.

To troubleshoot GPP Drive Maps, for example, you can change the default logging settings for that individual extension. To do so, you must first enable the logging and enable user/computer trace settings within a GPO, and then the GPO must be applied to the affected system by linking the GPO to the appropriate OU.

To enable logging and tracing on the GPP Drive Maps extension, follow these steps:

1. Create a new GPO named GPOLogSettings using the GPMC.

2. Open the GPO for editing and drill down to Computer Configuration\Administrative Templates\System\Group Policy\Logging and tracing and select it.

3. On the Settings page, double-click the Configure Drive Maps Preference Logging and Tracing setting to open it for editing.

4. Read the entire explanation in the Help section, select the Enabled radio button, pull down the Tracing menu, and select On, as shown in Figure 1.

Image

Figure 1. Enabling GPO Preference Drive Maps Logging and Tracing

5. In the User Trace Form field, note the path to the trace file and click OK to save the settings to the new GPO.

6. Back in the GPMC, link the new GPO to the appropriate OU containing the affected system.

7. Now you can force a Group Policy refresh on the OU within the GPMC by right-clicking the OU and selecting Group Policy Update and then clicking Yes in the confirmation window.

The Remote Group Policy Update results window will show the results of the remote update, and if successful, the new log setting GPO has been applied.

8. Because for this example we used the user-based preference extension Drive Maps, we need to have the user log off and log on to refresh the user-based GPO processing and then we can review the trace file located at %COMMONAPPDATA%\GroupPolicy\Preference\Trace\User.log, which will translate to Windows Vista and later as %systemdrive%\ProgramData or C:\ProgramData.

One important point to note is that if the GPO is not getting applied at all, there will be no tracefile. So, the Group Policy administrator must ensure that the policy is linked correctly and that that the security filtering is applied to the GPO correctly. This is where Group Policy Modeling can be used.

Group Policy Results

Now if the Group Policy administrator is sure the GPO is linked and is configured correctly, the actual processing can be checked on the affected system and for the affected user using GPO Resultant Set of Policies (RSoP). Windows 8 and Windows Server 2012, the GPMC includes new reporting capabilities that will assist Group Policy administrators tremendously. To run the Group Policy results tool, follow these steps:

1. Open the GPMC on an administrative system.

2. Expand the forest and select the Group Policy Results container.

3. Right-click the container and select Group Policy Results Wizard. Click Next on the Welcome page.

4. In the Computer Selection page, select the This Computer radio button or the Another Computer radio button and browse or type in the system name, and then click Next.

5. In the User Selection Windows, choose to load the policy processing for the existing user or any other listed that had previously logged on to the system, and then click Next.

6. On the Summary of Selections, review the selections, and then click Next to run the tool.

7. When the wizard completes, click Finish to return to the GPMC window, where the collected data will be presented.

8. In the resulting GPMC windows, the Group Policy administrator can review the results listed on the Summary, Details, and Policy Events tabs to review the GPO processing data, as shown in Figure 2.

Image

Figure 2. Review Group Policy results data.

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