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Create a Two-Way, Forest Trust for Both Sides of the Trust

Updated: January 9, 2009

Applies To: Windows Server 2008, Windows Server 2008 R2

You can this procedure to create both sides of a two-way, forest trust You must have administrative credentials for your forest as well as for the reciprocal forest. If you have administrative credentials only for your forest, you can use the procedure Create a Two-Way, Forest Trust for One Side of the Trust to create your side of the trust. Then, have the administrator for the reciprocal forest create a one-way, outgoing forest trust from his or her forest.

A two-way, forest trust allows users in your forest (the forest that you are logged on to at the time that you run the New Trust Wizard) and users in the reciprocal forest to access resources in any of the domains in either of the two forests.

You can create this forest trust by using the New Trust Wizard in the Active Directory Domains and Trusts snap-in.

Membership in Domain Admins in the forest root domain or Enterprise Admins in Active Directory Domain Services (AD DS), or equivalent, is the minimum required to complete this procedure. Review details about using the appropriate accounts and group memberships at Local and Domain Default Groups (http://go.microsoft.com/fwlink/?LinkId=83477).) If you are a member of the Incoming Forest Trust Builders group, you can create one-way, incoming, forest trusts to your forest. For more information about the Incoming Forest Trust Builders group, see How Domain and Forest Trusts Work (http://go.microsoft.com/fwlink/?LinkID=111481).

  1. Open Active Directory Domains and Trusts.

  2. In the console tree, right-click the domain node for the forest root domain for which you want to establish a trust, and then click Properties.

  3. On the Trusts tab, click New Trust, and then click Next.

  4. On the Trust Name page, type the Domain Name System (DNS) name of the forest root domain of the other forest, and then click Next.

  5. On the Trust Type page, click Forest trust, and then click Next.

  6. On the Direction of Trust page, click Two-way, and then click Next.

    For more information about the selections that are available on the Direction of Trust page, see "Direction of Trust" in Appendix: New Trust Wizard Pages.

  7. On the Sides of Trust page, click Both this domain and the specified domain, and then click Next.

    For more information about the selections that are available on the Sides of Trust page, see "Sides of Trust" in Appendix: New Trust Wizard Pages.

  8. On the User Name and Password page, type the user name and password for the appropriate administrator in the specified domain.

  9. On the Outgoing Trust Authentication Level--Local Forest page, do one of the following, and then click Next:

    • Click Forest-wide authentication.

    • Click Selective authentication.

  10. On the Outgoing Trust Authentication Level--Specified Forest page, do one of the following, and then click Next:

    • Click Forest-wide authentication.

    • Click Selective authentication.

  11. On the Trust Selections Complete page, review the results, and then click Next.

  12. On the Trust Creation Complete page, review the results, and then click Next.

  13. On the Confirm Outgoing Trust page, do one of the following:

    • If you do not want to confirm this trust, click No, do not confirm the outgoing trust. Note that if you do not confirm the trust at this stage, the secure channel will not be established until the first time the trust is used by users.

    • If you want to confirm this trust, click Yes, confirm the outgoing trust, and then supply the appropriate administrative credentials from the specified domain.

  14. On the Confirm Incoming Trust page, do one of the following:

    • If you do not want to confirm this trust, click No, do not confirm the incoming trust.

    • If you want to confirm this trust, click Yes, confirm the incoming trust, and then supply the appropriate administrative credentials from the specified domain.

  15. On the Completing the New Trust Wizard page, click Finish.

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