Verifying and resetting a trust
After you create a trust, you might regularly want to check whether the trust is working properly. You might be notified by people who report that they can no longer access resources in other domains or forests, or it might be an activity that you perform on a regular basis.
When a trust is broken, there is a way to reset it. Also, when you want to reset the shared secret on both sides of the trust, a reset of the trust is needed.
Getting ready
It is recommended that you sign in to the domain controller that is running the Domain Naming Master FSMO role or connect the Active Directory Domains and Trusts console to this specific domain controller, by right-clicking in the console on the Active Directory Domains and Trusts node and selecting Change Active Directory Domain Controller… from the context menu.
To find this domain controller, right-click the Active Directory Domains and Trusts node and select Operations Master... from the...