Enable or disable an existing name suffix from routing

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

To enable or disable an existing name suffix from routing

Open Active Directory Domains and Trusts.
In the console tree, right-click the domain node for the domain you want to administer, and then click Properties.
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.
Click the Name Suffix Routing tab, under Name suffixes in the x.x forest, do one of the following:
- To enable a name suffix, click the suffix that you want to enable, and then click Enable. If the Enable button appears dimmed, then the name suffix is already enabled.
- To disable a name suffix, click the suffix that you want to disable, and then click Disable. If the Disable button appears dimmed, then the name suffix is already disabled.

Notes

To perform this procedure, you must be a member of the Domain Admins group (in the forest root domain) or the Enterprise Admins group in Active Directory, or you must have been delegated the appropriate authority. As a security best practice, consider using Run as to perform this procedure. For more information, see Default local groups, Default groups, and Using Run as.
To open Active Directory Domains and Trusts, click Start, click Control Panel, double-click Administrative Tools, and then double-click Active Directory Domains and Trusts.
When you disable a name suffix, all children of that Domain Name System (DNS) name will also be disabled.
You cannot enable a name suffix that is in conflict. If the conflict is with a local user principal name (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.

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