$Users = Get-ADUser -SearchBase "OU=Sub-OU,OU=Parent-OU,DC=domain,DC=tld" -Filter * -Properties * | Select-Object SamAccountName,DisplayName,GivenName,Surname,whenCreated,Enabled,accountExpires,lastLogonTimestamp,LockedOut
$OUUsers = @()
$OUUsers += "SamAccountName,DisplayName,GivenName,Surname,whenCreated,Enabled,accountExpires,lastLogonTimestamp,LockedOut"
foreach ($User in $Users) {
    if ($User.accountExpires  -eq "9223372036854775807") {
        $OUUsers += "$($User.SamAccountName),$($User.DisplayName),$($User.GivenName),$($User.Surname),$(($User.whenCreated).ToString('yyyy-MM-ddZhh-mm-ss')),$($User.Enabled),$("Never"),$([datetime]::FromFileTime($User.lastLogonTimestamp).ToString('yyyy-MM-ddZhh-mm-ss')),$($User.LockedOut)"
    }
    if (-not($User.accountExpires  -eq "9223372036854775807")) {
        $OUUsers += "$($User.SamAccountName),$($User.DisplayName),$($User.GivenName),$($User.Surname),$(($User.whenCreated).ToString('yyyy-MM-ddZhh-mm-ss')),$($User.Enabled),$([datetime]::FromFileTime($User.accountExpires).ToString('yyyy-MM-ddZhh-mm-ss')),$([datetime]::FromFileTime($User.lastLogonTimestamp).ToString('yyyy-MM-ddZhh-mm-ss')),$($User.LockedOut)"
    }
}
$OUUsers | Out-File C:\tmp\OUUser-Report.csv

The script will search in domain.domain.tld\Parent-OU\Sub-OU and will select all users in this sub-OU. Here, it will collect the properties SamAccountName, DisplayName, GivenName, SurName, whenCreated, Enabled, accountExpires, lastLogonTimestamp and LockedOut. These properties will then be exported to the file OUUser-Report.csv which will be stored in C:\tmp.

The way to recover the file permissions are to do the following:

1. Right-click the Start button and press Windows Powershell (Administrator)
2. Execute the command takeown /f <full path to file> e.g., takeown /f C:\Windows\WindowsUpdate.log
3. This will transfer ownership from whichever user- or system account to the account executing the command. However, ownership does not necessarily grant access to deleting the file.
4. To reset this permission set, execute the command cacls <full path to file> /G <Username>:F e.g., cacls C:\Windows\WindowsUpdate.log /G Morten:F
5. You have now effectively transferred ownership permissions to your account.

To read the full list of operators and parameters for the commands, please refer to the official Microsoft documentation for cacls and takeown.