how to setup a windows domain trust?
['Open the Active Directory Domains and Trusts snap-in.', 'In the left pane, right-click the domain you want to add a trust for, and select Properties.', 'Click on the Trusts tab.', 'Click the New Trust button.', 'After the New Trust Wizard opens, click Next.', 'Type the DNS name of the AD domain and click Next.']