Validate a Trust

Applies To: Windows Server 2008, Windows Server 2008 R2

You can validate all trusts that are made between domains, but you cannot validate realm trusts.

You can use this procedure to validate a trust by using the New Trust Wizard in the Active Directory Domains and Trusts snap-in or by using the Netdom command-line tool. For more information about how to use the Netdom command-line tool to create a realm trust, see Netdom Overview (

Membership in Domain Admins or Enterprise Admins in Active Directory Domain Services (AD DS), or equivalent, is the minimum required to complete these procedures. Review details about using the appropriate accounts and group memberships at Local and Domain Default Groups (

Validating a trust

  • Using the Windows interface

  • Using the command line

To validate a trust using the Windows interface

  1. Open Active Directory Domains and Trusts.

  2. In the console tree, right-click the domain that contains the trust that you want to validate, and then click Properties.

  3. On the Trusts tab, under either Domains trusted by this domain (outgoing trusts) or Domains that trust this domain (incoming trusts), click the trust to be validated, and then click Properties.

  4. Click Validate.

  5. Do one of the following, and then click OK:

    • Click No, do not validate the incoming/outgoing trust.

      If you click this option, we recommend that you repeat this procedure for the reciprocal domain.

    • Click Yes, validate the incoming/outgoing trust.

      If you click this option, you must type a user account and password with administrative credentials for the reciprocal domain.

To validate a trust using the command line

  1. Open a Command Prompt as an administrator: On the Start menu, right-click Command Prompt, and then click Run as administrator. If the User Account Control dialog box appears, provide credentials, if required, and then click Continue.

  2. At the command prompt, type the following command, and then press ENTER:

    netdom trust <TrustingDomainName> /d:<TrustedDomainName> /verify
    Value Description


    Specifies the Domain Name System (DNS) name (or NetBIOS name) of the trusting domain in the trust that is being created.


    Specifies the DNS name (or NetBIOS name) of the domain that will be trusted in the trust that is being created.