# Active Directory name suffix routing
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After the one-way forest trust has been established, complete the following steps to validate suffix routing:

1. Under **Start > All Programs > Administrative Tools**, click **Active Directory Domains and Trusts**.

   The Active Directory Domains and Trusts console opens.

1. Right-click your corporate domain and click **Properties**

   The Properties dialog for that domain opens.

1. Click the **Trusts** tab.

   The Trusts page opens.

1. Click the Amazon domain name and click **Properties**.

   The Properties page for the Amazon domain trust opens.

1. Click **Name Suffix Routing** and click **Refresh**.

   Make sure there are no conflicts to ensure that the Service Principal Names (SPNs) can resolve over the trust.