As long as your user account that you’re signed in as is a member of the Domain admins group this command can be run from a terminal joined to the domain.

Backup all GPOs in Domain

Open powershell and use the following command:

PS C:\> Backup-Gpo -All -Path "\\Server1\GpoBackups"

Restore all GPOs in Domain

Use the “Restore-GPO” cmdlet.

PS C:\> Restore-GPO -All -Domain "contoso.com" -Path "\\Server1\Backups"

Recover a specific GPO

https://docs.microsoft.com/en-us/powershell/module/grouppolicy/import-gpo?view=win10-ps

Sources:

https://docs.microsoft.com/en-us/powershell/module/grouppolicy/backup-gpo?view=win10-ps

https://docs.microsoft.com/en-us/powershell/module/grouppolicy/restore-gpo?view=win10-ps