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Change the Routing Status of a Name Suffix

Updated: March 1, 2012

Applies To: Windows Server 2008, Windows Server 2008 R2, Windows Server 2012

You can use the Active Directory Domains and Trusts snap-in to view and modify the routing status of name suffixes.

Name suffix routing is a mechanism that you can use to manage how authentication requests are routed across Windows Server 2008 or Windows Server 2008 R2 forests that are joined by forest trusts. To simplify the administration of authentication requests, when you create a forest trust all unique name suffixes are routed by default. A unique name suffix is a name suffix within a forest, such as a user principal name (UPN) suffix, service principal name (SPN) suffix, or Domain Name System (DNS) forest or domain tree name, that is not subordinate to any other name suffix.

Membership in Domain Admins or Enterprise Admins , or equivalent, is the minimum required to complete this procedure. Review details about using the appropriate accounts and group memberships at http://go.microsoft.com/fwlink/?LinkId=83477.

To change the routing status of a name suffix

  1. Open Active Directory Domains and Trusts. To open Active Directory Domains and Trusts, click Start , click Administrative Tools , and then click Active Directory Domains and Trusts .

    To open Active Directory Domains and Trusts in Windows Server® 2012, click Start , type domain.msc .

  2. In the console tree, right-click the domain node for the domain that you want to administer, 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 forest trust that you want to administer, and then click Properties .

  4. On the Name Suffix Routing tab, under Name suffixes in the x.x forest , click the suffix for which you want to modify the routing status, and then click Edit .

  5. In Existing name suffixes in x.x , click the suffix that you want to modify, and then click Enable or Disable .

Additional considerations

  • To perform this procedure, you must be a member of the Domain Admins group or Enterprise Admins group in Active Directory Domain Services (AD DS), or you must have been delegated the appropriate authority. If the computer is joined to a domain, members of the Domain Admins group might be able to perform this procedure. As a security best practice, consider using Run as to perform this procedure. For more information, search for "using run as" in Help and Support.

  • You cannot enable a name suffix that is in conflict. If the conflict is with a local UPN name suffix, you must remove the local UPN name suffix before you can enable the routing name. If the conflict is with a name that is claimed by another trust partner, you must disable the name in the other trust before it can be enabled for this trust.

  • To view a log of name suffixes, DNS names, NetBIOS names, and the status that is associated with this trust, click Save As . This log can assist you in troubleshooting authentication problems.

Additional references

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