I have SharePoint 2010 and Active Directory as a Domain Controller. Now, there is a request from a client who has his own DC and wants to connect to my SharePoint site. Note that there is a two-way trust relationship between the 2 DCs. What are the steps to give them access by using their usernames+pswd?
I tried to create a sync connection through Central Admin by using a username+password that the client gave me but I get an error: The LDAP server is unavailable.