I have a SharePoint server 2010 in forest A, domain1.local and the users is in forest B, domain2.local. There is a two-way trust between forest A and forest B. I want to restrict the people picker only to list users from a specific OU in forest B, domain2.local. I am able to restrict the listing of users to an OU within the same domain using the following command:
stsadm.exe -o setsiteuseraccountdirectorypath -url <url> -path "<path>"
However, I have not figured out how to restrict it to an OU in the other forest and domain. Any clarification on how to resolve this issue is appreciated.