Handy Powershell
Export details of users in a specific OU:
$OUpath = 'OU=CKH Leavers & Disabled Accounts,OU=CKH Users,DC=ckh,DC=local'
$ExportPath = 'c:\users\alekscms\disabledaccounts.csv'
Get-ADUser -Filter * -SearchBase $OUpath | Select-object DistinguishedName,Name,UserPrincipalName,sAMAccountName | Export-Csv -NoType $ExportPath