PowerShell
Group Policy Eater is a PowerShell module that aims to gather information about Group Policies but also allows fixing issues that you may find in them.

GPOZaurr

Table of Contents

• GPOZaurr
  • Table of Contents
  • Installing
  • Updating
  • Resources
  • Changelog

Installing

GPOZaurr requires RSAT installed to provide results. If you don't have them you can install them as below. Keep in mind it also installs GUI tools so it shouldn't be installed on user workstations.

# Windows 10 Latest
Add-WindowsCapability -Online -Name 'Rsat.ActiveDirectory.DS-LDS.Tools~~~~0.0.1.0'
Add-WindowsCapability -Online -Name 'Rsat.GroupPolicy.Management.Tools~~~~0.0.1.0'

Finally just install module:

Install-Module -Name GPOZaurr -AllowClobber -Force

Force and AllowClobber aren't necessary, but they do skip errors in case some appear.

Updating

Update-Module -Name GPOZaurr

That's it. Whenever there's a new version, you run the command, and you can enjoy it. Remember that you may need to close, reopen PowerShell session if you have already used module before updating it.

The essential thing is if something works for you on production, keep using it till you test the new version on a test computer. I do changes that may not be big, but big enough that auto-update may break your code. For example, small rename to a parameter and your code stops working! Be responsible!

Resources

To understand the usage I've created blog post you may find useful

• The only command you will ever need to understand and fix your Group Policies (GPO)

Changelog

• 0.0.113 - 2021.01.25
  • Improved Invoke-GPOZaurr
    • Report GPOAnalysis - added WindowsTimeService
  • Improved Invoke-GPOZaurrContent
    • Added WindowsTimeService type
• 0.0.112 - 2021.01.25
  • Improved Invoke-GPOZaurr
• 0.0.111 - 2021.01.24
  • Improved Invoke-GPOZaurr
• 0.0.110 - 2021.01.22
  • Improved Invoke-GPOZaurr
• 0.0.109 - 2021.01.11
  • Improved Invoke-GPOZaurr
• 0.0.108 - 2021.01.11
  • Improved Invoke-GPOZaurr
    • Improved GPOConsistency
• 0.0.107 - 2021.01.11
  • Improved Invoke-GPOZaurr
• 0.0.106 - 2021.01.11
  • Improved Invoke-GPOZaurrContent
• 0.0.105 - 2021.01.05
  • Improved Get-GPOZaurr
    • Improved report GPOBrokenLink
• 0.0.104 - 2021.01.04
  • Improved Get-GPOZaurrBrokenLink
  • Improved Repair-GPOZaurrBrokenLink
  • Improved Get-GPOZaurr
    • Improved report GPOBrokenLink
• 0.0.103 - 2021.01.04
  • Improved Get-GPOZaurr
    • Added new report GPOBrokenLink
  • Added Get-GPOZaurrBrokenLink
  • Added Repair-GPOZaurrBrokenLink
• 0.0.102 - 2021.01.02
  • Improved Get-GPOZaurrLink
    • Supports all links across forest
    • Renamed Linked validate set from Other to OrganizationalUnit
  • Improved Get-GPOZaurrLinkSummary
  • Improved/BugFix Get-GPOZaurr to properly detect linked GPOs in sites/cross-domain
  • Improved Invoke-GPOZaurrPermission
    • Renamed Linked validate set from Other to OrganizationalUnit
  • Improved Invoke-GPOZaurr
    • Added GPOLinks basic list
• 0.0.101 - 23.12.2020
  • Improved Get-GPOZaurrBroken
    • It now detects ObjectClass Issue
    • Heavily improved performance
    • Removed some useless properties for this particular cmdlet
    • All states: Not available on SYSVOL, Not available in AD, Exists, Permissions Issue, ObjectClass Issue
    • Improved help
  • Improved Remove-GPOZaurrBroken
    • It now deals with ObjectClass Issue
    • Heavily improved performance
    • Removed some useless properties for this particular cmdlet
    • Now requires manual type insert AD, SYSVOL or ObjectClass (or all of them). Before it was auto using AD/SYSVOL.
    • Improved help
  • Improved Invoke-GPOZaurr
    • Type GPOList
    • Renamed GPOOrphans to GPOBroken
    • Improved GPOBroken with ObjectClass issue
• 0.0.100 - 21.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOPermissionsRead
    • Type GPOPermissions
• 0.0.99 - 13.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOList - require GPO to be 7 days old for deletion to be proposed
    • Type GPOPermissions - one stop for permissions
    • Allows Steps to be chosen via their menu and out-of-order
  • Improved Remove-GPOZaurr - added RequireDays parameter to prevent deletion of just modified GPOs
  • Added Get-GPOZaurrPermissionAnalysis
  • Added Repair-GPOZaurrPermission
• 0.0.98 - 10.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOList - fixed unexpected ending of cmdlet when error occurs (for example deleted GPO while script is running) which could impact results
    • Other types - small color adjustment
  • Fixed/Improved Get-GPOZaurr - fixed unexpected ending of cmdlet when error occurs (for example deleted GPO while script is running), improved code base
  • Improved Invoke-GPOZaurrSupport
• 0.0.97 - 07.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOList - added more data, did small reorganization
• 0.0.96 - 07.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOList - added more data, added Optimization Step
  • Added Set-GPOZaurrStatus
  • Added Optimize-GPOZaurr
  • Fixed Invoke-GPOZaurrPermission which would not remove permission due to internal changes earlier on
  • Small change to Backup-GPOZaurr
    • Added support for Disabled. It's now possbile to backup All (default), Empty,Unlinked,Disabled or a mix of them
    • Removed useless GPOPath parameter
• 0.0.95 - 04.12.2020
  • Fix for too big int - #4 - tnx neztach
  • Improved Invoke-GPOZaurr
    • Type GPOList - added ability for Exclusions
    • All other types, small improvements
    • Added HideSteps, ShowError, ShowWarning -> Disabled Warnings/Errors by default as they tend to show too much information
  • Improved Remove-GPOZaurr - added Exclusions
• 0.0.93 - 03.12.2020
  • Improved Invoke-GPOZaurr
    • Type GPOList reverted charts colors for entries to match colors
    • Added Skip-GroupPolicy to use within Invoke-GPOZaurr
  • Improved Invoke-GPOZaurr with basic support for Exclusions
  • Improved Get-GPOZaurr with basic support for Exclusions
  • Improved Remove-GPOZaurrPermission error handling
• 0.0.92 - 01.12.2020
  • Improved Invoke-GPOZaurrSupport
  • Improved Invoke-GPOZaurr
    • Type GPOList improved with more data, more problems and clearer information
  • Improved Remove-GPOZaurr
    • Added ability do remove disabed GPO
  • Improved Get-GPOZaurr detecting more issues, delivering more data
• 0.0.91 - 24.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Improve Type GPOPermissionsUnknown
• 0.0.90 - 23.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Improves Type GPODuplicates
      • Fix for chart color to be RED
    • Add Type GPOPermissionsUnknown
    • Improves logic for Data with 0/1 element
  • Improves Remove-GPOZaurrDuplicateObject - removed Confirm requirement
  • Improves Get-GPOZaurrNetLogon with more verbose
  • Improves Repair-GPOZaurrNetLogonOwner with more verbose and fix for LimitProcessing
• 0.0.89 - 22.11.2020
  • Small update Add-GPOZaurrPermission
  • Improves Invoke-GPOZaurr (WIP)
    • Added Type GPOPermissionsAdministrative
• 0.0.88 - 18.11.2020
  • Fix for Add-GPOZaurrPermission
• 0.0.87 - 18.11.2020
  • Improve error handling Remove-GPOZaurrBroken
• 0.0.86 - 18.11.2020
  • Improve error handling Remove-GPOZaurrBroken
• 0.0.85 - 17.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Split NetLogonPermissions into NetLogonPermissions and NetLogonOwners
    • Improved type NetLogonPermissions
    • Improved type NetLogonOwners
  • Improves Get-GPOZaurrFiles
  • Improves Get-GPOZaurrNetLogon
  • Fix for Get-GPOZaurrNetLogon
• 0.0.84 - 16.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Type NetLogonPermissions
  • Fix for Get-GPOZaurrNetLogon
• 0.0.83 - 14.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Fix for wrong ActionRequired count
• 0.0.82 - 14.11.2020
  • Added Get-GPOZaurrPermissionIssue to detect permission issue with no rights
  • Improves Invoke-GPOZaurr (WIP)
    • Type GPOPermissionsRead improved detection of problems with low permissions
• 0.0.81 - 12.11.2020
  • Fix for Set-GPOZaurrOwner in case of missing permissions to not throw errors
  • Improves Invoke-GPOZaurr (WIP)
    • Type GPOPermissionsRead added
• 0.0.80 - 12.11.2020
  • Improves Invoke-GPOZaurr (WIP)
    • Type GPOOrphans clearer options, updated texts, split per domain
    • Type GPOOwners clearer options, updated texts, split per domain
  • Improves Add-GPOZaurrPermission
    • Fixes LimitProcessing to work correctly
    • Added All to process all GPOs
  • Fixes Remove-GPOZaurrPermission
  • Improves Set-GPOZaurrOwner
    • Added Force to force GPO Owner to any principal (normally only Domain Admins)
• 0.0.79 - 10.11.2020
  • Improved Invoke-GPOZaurr - type GPOOrphans
• 0.0.78 - 10.11.2020
  • Improved Remove-GPOZaurrBroken more verbose
  • Improved Get-GPOZaurrBroken more verbose
  • Improved Invoke-GPOZaurr - type GPOOrphans
  • Improved Invoke-GPOZaurr - type GPOList - needs more work
  • Improved Get-GPOZaurr with better detection of Empty Policies (needs testing)
• 0.0.77 - 9.11.2020
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.76 - 8.11.2020
  • Improved Get-GPOZaurrNetLogon to better handle errors
• 0.0.75 - 8.11.2020
  • Improved Get-GPOZaurrPermissionConsistency to stop checking consistency if path doesn't exists
• 0.0.74 - 8.11.2020
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.73 - 7.11.2020
  • Improved Invoke-GPOZaurr (WIP)
  • Improved Get-GPOZaurr
• 0.0.72 - 6.11.2020
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.71 - 3.11.2020
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.70 - 29.10.2020
  • Added Get-GPOZaurrDuplicateObject
  • Added Remove-GPOZaurrDuplicateObject
• 0.0.69 - 29.10.2020
  • Improved Invoke-GPOZaurr (WIP)
  • Improved Get-GPOZaurrNetLogon
  • Improved Get-GPOZaurrOwner
  • Improved Set-GPOZaurrOwner
  • Added Repair-GPOZaurrNetLogonOwner
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.68 - 28.10.2020
  • Renamed Show-GPOZaurr to Invoke-GPOZaurr
  • Renamed Invoke-GPOZaurr to Invoke-GPOZaurrContent
  • Improvements to Get-GPOZaurrPermissionConsistency - don't check for inherited permissions if top level ones are inconsistent
  • Improved Invoke-GPOZaurr (WIP)
• 0.0.67 - 22.10.2020
  • Improved Show-GPOZaurr (WIP)
• 0.0.66 - 22.10.2020
  • Improved Show-GPOZaurr (WIP)
• 0.0.65 - 22.10.2020
  • Improved Show-GPOZaurr (WIP)
• 0.0.64 - 21.10.2020
  • Renamed Remove-GPOZaurrOrphaned to Remove-GPOZaurrBroken keeping it as an alias
  • Renamed Get-GPOZaurrSysvol to Get-GPOZaurrBroken keeping it as an alias
  • Improved Show-GPOZaurr (WIP)
• 0.0.63 - 19.10.2020
  • Renamed Invoke-GPOZaurrContent back to Invoke-GPOZaurr
  • Added Show-GPOZaurr (WIP)
  • Added OutputType,OutputType,Open,Online parameters to Invoke-GPOZaurr
  • Added Get-GPOZaurrNetLogon
  • Improved Get-GPOZaurrOwner
  • Fixes Get-GPOZaurrSysvol
• 0.0.62 - 14.10.2020
  • Renamed Invoke-GPOZaurr to Invoke-GPOZaurrContent - I want to use Invoke-GPOZaurr for something else
  • Improvements to Get-GPOZaurrPermissionConsistency for GPOs without SYSVOL to be reported properly
  • Added Get-GPOZaurrPermissionRoot
  • Renamed Remove-GPOZaurrOrphanedSysvolFolders to Remove-GPOZaurrOrphaned
  • Improved Remove-GPOZaurrOrphaned to deal with orphaned folders but also orphaned AD GPO (No sysvol data)
  • Improved Get-GPOZaurrSysVol to detect orphaned SYSVOL or AD GPO objects
  • Improved Get-GPOZaurrSysVol to detect permissions issue when reading AD GPO objects
  • Added Get-GPOZaurrPermissionRoot to show which users/groups have control over all GPOs (allowed to create/modify)
  • Improved Get-GPOZaurrPermissionSummary to include Get-GPOZaurrPermissionRoot custom permissions
  • Updated Remove-GPOZaurrPermission
  • Updated Get-GpoZaurrPermission
  • Updated Get-GPOZaurrFiles to better handle access issue
  • Reversed parameters Get-GPOZaurrFiles from Limited to ExtendedMetaData and fixed missing columns
• 0.0.61 - 31.08.2020
  • Improvement to Get-GPOZaurrPermissionSummary
  • Fixes to ConvertFrom-CSExtension
  • Fixes to Find-CSExtension
• 0.0.59 - 26.08.2020
  • Improvement to Get-GPOZaurrPermissionSummary
• 0.0.58 - 26.08.2020
  • Improvement to Get-GPOZaurrPermissionSummary
• 0.0.57 - 26.08.2020
  • Improvement to Get-GPOZaurrPermissionSummary
• 0.0.56 - 26.08.2020
  • Added Get-GPOZaurrPermissionSummary
• 0.0.55 - 17.08.2020
  • Improved Get-GPOZaurrInheritance
• 0.0.54 - 16.08.2020
  • Added Invoke-GPOZaurrSupport (WIP)
  • Added ConvertFrom-CSExtension
  • Added Find-CSExtension
  • Added Get-GPOZaurrInheritance
• 0.0.53 - 16.08.2020
  • Bad release
• 0.0.52 - 16.08.2020
  • Bad release
• 0.0.51 - 2.08.2020
  • Updates to Invoke-GPOZaurr - still work in progress
  • Added Get-GPOZaurrSysvolDFSR
  • Added Clear-GPOZaurrSysvolDFSR (requires testing)
• 0.0.50 - 29.07.2020
  • Updates to couple of commands
• 0.0.49 - 23.07.2020
  • Hidden files were skipped - and people do crazy things with them
• 0.0.48 - 21.07.2020
  • Added Get-GPOZaurrFilesPolicyDefinition
  • Updates to Invoke-GPOZaurr - still work in progress
  • Updates to Get-GPOZaurrFiles - still work in progress
  • Updates to Remove-GPOZaurrOrphanedSysvolFolders with backup and support for domains
  • Module will now be signed
• 0.0.47 - 29.06.2020
  • Update to Get-GPOZaurrAD for better error reporting
  • Updates to Invoke-GPOZaurr - still work in progress
• 0.0.46 - 28.06.2020
  • Additional protection for Get-GPOZaurrAD for CNF duplicates
  • Update to Save-GPOZaurrFiles
  • Added Invoke-GPOZaurr (alias: Find-GPO) (heavy work in progress)
• 0.0.45 - 26.06.2020
  • During publishing ADEssentials required functions are now merged to prevent cyclic dependency bug Using ModuleSpec syntax in RequiredModules causes incorrect "cyclic dependency" failures
• 0.0.44 - 24.06.2020
  • Improvement to Get-GPOZaurrLinkSummary
• 0.0.43 - 21.06.2020
  • Added Get-GPOZaurrFiles to list files on NETLOGON/SYSVOL shares with a lot of details
• 0.0.42 - 19.06.2020
  • Fix for Get-GPOZaurrLink and SearchBase parameter
  • Fix for Get-GPOZaurrLink - canonical link Trim() throwing errors if empty
• 0.0.41 - 18.06.2020
  • Added paramerter SkipDuplicates to Invoke-GPOZaurrPermission which prevents applying permissions over and over again if 1 GPO is linked to a multiple OU's within another OU
• 0.0.40 - 18.06.2020
  • Fix for error Get-GPOZaurrLink - same issue as described on my earlier blog - Get-ADObject : The server has returned the following error: invalid enumeration context..
    • WARNING: Get-GPOZaurrLink - Processing error The server has returned the following error: invalid enumeration context.
    • WARNING: Get-GPOZaurrLink - Processing error A referral was returned from the server
  • Added SkipDuplicates for Get-GPOZaurrLink
• 0.0.39 - 17.06.2020
  • Updates to Invoke-GPOZaurrPermission with new parameter LimitAdministrativeGroupsToDomain
    • This will get administrative based on IncludeDomains if given. It means that if GPO has Domain admins added from multiple domains it will only find one, and remove all other Domain Admins (if working with Domain Admins that is)
• 0.0.38 - 17.06.2020
  • Update to Get-PrivGPOZaurrLink which would cause problems to Invoke-GPOZaurrPermission if it would be run without Administrative permission and GPO wouldn't be accessible for that user
• 0.0.37 - 16.06.2020
  • Updates to Invoke-GPOZaurrPermission with new parameterset Level
  • Updates to Get-GPOZaurrLinkSummary
• 0.0.36 - 15.06.2020
  • Initial release