Securing Built-in Administrator Accounts in Active Directory

All of us know that the built-in Administrator account cannot be locked out and it has the following behaviour:

  1. The authentication package ignores the Lockout attribute and returns a failed login
  2. The Lockout attribute is reset upon successful login.

If you want to secure this account, head to the following link:

https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/plan/security-best-practices/appendix-d–securing-built-in-administrator-accounts-in-active-directory

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