Active Directory

UserAccountControl Attribute/Flag Values

UserAccountControl Attribute/Flag Values

UserAccountControl is one of the most important attributes of user and computer accounts in Active Directory. This attribute determines the status of the account in the AD domain: whether the account is active or locked, whether the option of password change at the next logon is enabled, whether users can change their passwords, etc. However, not all administrators are fully aware of how and for what purpose UserAccountControl attribute is used in AD.

Open the properties of any AD account in the Active Directory Users and Computers (ADUC) console and go to the Accounttab. Please, pay attention to the group of user attributes in the Account Options section. Here you can see the following options:

  • User must change password at next logon;
  • User cannot change password;
  • Password never expires;
  • Store password using reversible encryption;
  • Account is disabled;
  • Smart card is required for interactive logon;
  • Account is sensitive and cannot be delegated;
  • Use Kerberos DES encryption types for this account;
  • This account supports Kerberos AES 128/256 bit encryption;
  • Do not require Kerberos Preauthentication.

The table of available flags of AD accounts is given below. Each flag corresponds to a certain UserAccountControl bit, and UserAccountControl value equals to the sum of all flags.

Property Flag Value In Hexadecimal Value In Decimal Not Officially Documented
SCRIPT 0x0001 1
ACCOUNTDISABLE 0x0002 2
HOMEDIR_REQUIRED 0x0008 8
LOCKOUT 0x0010 16
PASSWD_NOTREQD 0x0020 32
PASSWD_CANT_CHANGE 0x0040 64
ENCRYPTED_TEXT_PWD_ALLOWED 0x0080 128
TEMP_DUPLICATE_ACCOUNT 0x0100 256
NORMAL_ACCOUNT 0x0200 512
Disabled Account 0x0202 514 x
Enabled, Password Not Required 0x0220 544 x
Disabled, Password Not Required 0x0222 546 x
INTERDOMAIN_TRUST_ACCOUNT 0x0800 2048
WORKSTATION_TRUST_ACCOUNT 0x1000 4096
SERVER_TRUST_ACCOUNT 0x2000 8192
DONT_EXPIRE_PASSWORD 0x10000 65536
Enabled, Password Doesn’t Expire 0x10200 66048 x
Disabled, Password Doesn’t Expire 0x10202 66050 x
Disabled, Password Doesn’t Expire & Not Required 0x10222 66082 x
MNS_LOGON_ACCOUNT 0x20000 131072
SMARTCARD_REQUIRED 0x40000 262144
Enabled, Smartcard Required 0x40200 262656 x
Disabled, Smartcard Required 0x40202 262658 x
Disabled, Smartcard Required, Password Not Required 0x40222 262690 x
Disabled, Smartcard Required, Password Doesn’t Expire 0x50202 328194 x
Disabled, Smartcard Required, Password Doesn’t Expire & Not Required 0x50222 328226 x
TRUSTED_FOR_DELEGATION 0x80000 524288
Domain controller 0x82000 532480
NOT_DELEGATED 0x100000 1048576
USE_DES_KEY_ONLY 0x200000 2097152
DONT_REQ_PREAUTH 0x400000 4194304
PASSWORD_EXPIRED 0x800000 8388608
TRUSTED_TO_AUTH_FOR_DELEGATION 0x1000000 16777216
PARTIAL_SECRETS_ACCOUNT 0x04000000 67108864

Property flag descriptions (Copied from KB Article)

  • SCRIPT – The logon script will be run.
  • ACCOUNTDISABLE – The user account is disabled.
  • HOMEDIR_REQUIRED – The home folder is required.
  • PASSWD_NOTREQD – No password is required.
  • PASSWD_CANT_CHANGE – The user cannot change the password. This is a permission on the user’s object. For information about how to programmatically set this permission.
  • ENCRYPTED_TEXT_PASSWORD_ALLOWED – The user can send an encrypted password.
  • TEMP_DUPLICATE_ACCOUNT – This is an account for users whose primary account is in another domain. This account provides user access to this domain, but not to any domain that trusts this domain. This is sometimes referred to as a local user account.
  • NORMAL_ACCOUNT – This is a default account type that represents a typical user.
  • INTERDOMAIN_TRUST_ACCOUNT – This is a permit to trust an account for a system domain that trusts other domains.
  • WORKSTATION_TRUST_ACCOUNT – This is a computer account for a computer that is running Microsoft Windows NT 4.0 Workstation, Microsoft Windows NT 4.0 Server, Microsoft Windows 2000 Professional, or Windows 2000 Server and is a member of this domain.
  • SERVER_TRUST_ACCOUNT – This is a computer account for a domain controller that is a member of this domain.
  • DONT_EXPIRE_PASSWD – Represents the password, which should never expire on the account.
  • MNS_LOGON_ACCOUNT – This is an MNS logon account.
  • SMARTCARD_REQUIRED – When this flag is set, it forces the user to log on by using a smart card.
  • TRUSTED_FOR_DELEGATION – When this flag is set, the service account (the user or computer account) under which a service runs is trusted for Kerberos delegation. Any such service can impersonate a client requesting the service. To enable a service for Kerberos delegation, you must set this flag on the userAccountControl property of the service account.
  • NOT_DELEGATED – When this flag is set, the security context of the user is not delegated to a service even if the service account is set as trusted for Kerberos delegation.
  • USE_DES_KEY_ONLY – (Windows 2000/Windows Server 2003) Restrict this principal to use only Data Encryption Standard (DES) encryption types for keys.
  • DONT_REQUIRE_PREAUTH – (Windows 2000/Windows Server 2003) This account does not require Kerberos pre-authentication for logging on.
  • PASSWORD_EXPIRED – (Windows 2000/Windows Server 2003) The user’s password has expired.
  • TRUSTED_TO_AUTH_FOR_DELEGATION – (Windows 2000/Windows Server 2003) The account is enabled for delegation. This is a security-sensitive setting. Accounts that have this option enabled should be tightly controlled. This setting lets a service that runs under the account assume a client’s identity and authenticate as that user to other remote servers on the network.
  • PARTIAL_SECRETS_ACCOUNT – (Windows Server 2008/Windows Server 2008 R2) The account is a read-only domain controller (RODC). This is a security-sensitive setting. Removing this setting from an RODC compromises security on that server.

UserAccountControl values

These are the default UserAccountControl values for the certain objects:

  • Typical user : 0x200 (512)
  • Domain controller : 0x82000 (532480)
  • Workstation/server: 0x1000 (4096)

So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!

Recommended content

Guys please don’t forget to like and share the post. You can also share the feedback on below windows techno email id.

If you have any questions feel free to contact us on admin@windowstechno.com also follow us on facebook@windowstechno to get updates about new blog posts.

How useful was this post?

Click on a star to rate it!

As you found this post useful...

Follow us on social media!

Was this article helpful?
YesNo

Vipan Kumar

He is an Active Directory Engineer. He has been working in IT industry for more than 10 years. He is dedicated and enthusiastic information technology expert who always ready to resolve any technical problem. If you guys need any further help on subject matters, feel free to contact us on admin@windowstechno.com Please subscribe our Facebook page as well website for latest article. https://www.facebook.com/windowstechno

Leave a Reply

Back to top button