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  • KDC_ERR_PREAUTH_REQUIRED vs. KDC_ERR_PREAUTH_FAILED

    I often seen network admins look at a network trace and say we have a lot of authentication failures and point to the error – KDC_ERR_PREAUTH_REQUIRED. I have spent time educating on why this is not an authentication failure but instead the default...
  • Active Directory Accidental Deletion - Prevention & Cure

    Accidental deletions in active directory can cause havoc and unfortunately in the past I was in the middle of one such catastrophic event. It resulted in 4000 odd servers and client machines part of an OU to be deleted and the cause was found to be some...
  • Auto-Mail Expiring Domain Accounts

    I was looking online for automating the task of domain account expiry notification for one my customers to provide as a reference and found a few which were using quest based PowerShell scripts. The customer required this due to a large number of outsourced...