Group Policy Requires Each Computer Account to Have Permission to Read

Using GPO's to employ settings to users and computers take always been a bang-up mode to brand administration and deployments more than seamless for admins and users.

Working with many unlike customers, where It has various feel with this, I come across a lot of misconfigured Group Policies, then why not write a post about information technology.

Group Policy is a powerful tool, and if a GPO gets incorrectly configured it can have dramatic impact on both users, computers and servers for the arrangement, this can happen by elementary human error too as lack of understanding how to configure this correctly.

At present, if you want to limit the impact ration for what the GPO settings applies to, you have a few options. I volition walk through the basics here.

WMI filtering

Group Policy WMI filters were introduced with Windows XP, and are supported in Windows Server 2003, Windows Vista, and Windows Server 2008. They arenon supported in Windows 2000 .

WMI filters makes it possible to prepare common criteria for when the GPO should have effect. They can be useful if your Advert structure is relatively flat and non organized with separate OU'south for different objects in Advertisement.

They likewise give the possibility to apply settings based on OS version, network, server roles and various criteria.

For creating WMI lawmaking you tin utilize the following tool (WMI Code Creator) to assistance you out:
https://www.microsoft.com/en-the states/download/details.aspx?id=8572

For example, you could create a policy for deploying Citrix Receiver to the computers in the system.
With WMI filter, you tin can then put this policy on the top level of the domain – forth with the Default Domain Policy, apply a WMI filter and so the GPO only applies to figurer objects with a desktop operating organisation.
This will ensure that all computers in the domain, regardless of OU placement for the Computer Account in Advertisement, gets the GPO applied, while servers do non get the gpo. Uncomplicated example.

Filters are evaluated in the following society – top to bottom.

1. Policies in hierarchy are located.
   

2. WMI Filters are checked.
   

3. Security settings are checked.
   

4. Finally, in one case everything has passed, a policy is applied.
   

So, we detect all the policies that be in the user/calculator'due south Local, Site, Domain, and OU hierarchy.
And so we determine if the WMI filter evaluates as True.
Then we verify that the user/reckoner has Read and Apply Group permissions for the GPO.
This ways that WMI filters are still less efficient than hierarchical linking, but we can use filters to make decisions in a non-hierarchical Agile Directory blueprint.

OU link with Security Filtering

This is maybe the most wildly used pick, and the one where I personally see the about misconfiguration.
You lot create a GPO with needed settings, the GPO gets linked to a container in AD (OU), and you set up the security filtering to decide who and what within the OU the GPO applies to.

When you lot create a GPO, the default security filtering is set to Authenticated Users – and this is where the mistakes oft happen.

And so, what exactly is Authanticated Users?

The following article gives some insight to this.
https://www.morgantechspace.com/2013/08/authenticated-users-vs-domain-users.html

The Authenticated Users grouping contains users who have authenticated to the domain or a domain that is trusted by the computer domain. Authenticated Users will contain all manually created user accounts in all trusted domains regardless of whether they are a fellow member of the Domain Users grouping or not.  Authenticated Users specifically does not incorporate the built-in Guest account, but volition incorporate other users created and added to Domain Guests.

The following listing shows the members who are fall under this group

• All the domain users and users who are in trusted domain.
  

• Local computers.
  

• Born organization accounts.
  

This makes a GPO with authenticated users equally the security filtering, pretty much use to anything within the linked OU, significant this could cause some serious commotion if the GPO gets linked to the wrong OU, or even worse, at top domain level.

Information technology is ok to to this if you want the GPO to employ to everything in the linked OU, merely exist certain nigh the settings in the GPO and the expected audience, before y'all enable the link.

If you wish to edit the Security Filtering to utilize only to a selected Advertizing Group containing users/computers/server, I regularly see that the admin just removing the Authenticated Users group from the Security Filtering like then:

They then go the following message, which they of course just answers OK to, without reading:

And then adds the other group they want to apply the settings to, they then get surprised that the GPO is not applying to their user/computers.

The reason for this is that when you remove the Authenticated Users grouping from Security Filtering, both read and apply permissions are removed from that group.
If you want the settings to apply to a specific grouping, you still demand Read permissions for the Authenticated Users group on the GPO.

This can be controlled by going to the Delegation tab after y'all have selected a GPO.

In the security tab, select authenticated Users, and check that Read is allowed, and that the box for allow under Use Group policy is unchecked.

After you accept removed the Utilise checkbox, you tin go back to the Scope tab, and will run into that authenticated users group no longer exists under Security Filtering, and you lot can add the wanted group here. Now Authenticated Users group yet has Read permissions, and your GPO will apply as expected.

Another example of things I see regularly is when the Security filtering contains both authenticated users grouping and the administrators selected groups.
This will just not work, if yous desire to regulate the Security Filtering, be certain to only apply read permissions to the Authenticated Users grouping, otherwise your settings will virtually likely apply to more then what you lot intentionally wanted.

Group Policy Preferences – Item level targeting

The 2 previous options revolve around how you can use unlike approaches to apply a Group Policy to selected objects.
This goes for all settings in the specified GPO.

Now, with Group policy Preferences you tin can have the aforementioned GPO apply different (or aforementioned) settings to different objects based on unlike criteria.
This primarily goes for the settings bachelor under the Prefrences folder nether Computer/User configuration when editing a GPO.

A common example of this is bulldoze mappings:
Go to user configuration\prefrences\windows settings\drive maps and add a new drive

Fill up out as needed, and click the mutual tab.

Click the Item-level targeting checkbox, then the Targeting push button

You so come to the Targeting editor where you can specify the criteria for when the setting should apply/not apply, and the options give you lot a fair share of flexibility

To make a meaningless example, you could add something similar this

Making the drive simply get mapped if the user is a member of Domains users, and the users reckoner has 512MB of gratuitous ram or 80GB gratis disk infinite on his/her computer.

This makes it possible to reduce the number of needed GPOs for similar settings, and rather utilize the same GPO with Item-level Targeting to specify when where and on what the polciy is to get in to upshot.

As you lot can run into there are a lot of options available for customizing GPO'south in a flexible way.
Hope this clears upwards some confusion for anyone.

Some other pages with data around the subject:
https://www.thewindowsclub.com/group-policy-for-beginners-guide-from-microsoft

https://blogs.technet.microsoft.com/grouppolicy/2009/07/30/security-filtering-wmi-filtering-and-item-level-targeting-in-group-policy-preferences/

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Consultant managing director & SME @ iteam, localized in Kristiansund, Kingdom of norway.

Focused on EUC, security, mobility, virtualization, management and a modern workplace.
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Source: https://dybbugt.no/2018/794/