Using SharePoint with several Active Directories

How can I configure SharePoint 2010 to use several different Active Directories f开发者_运维技巧or authentication?

Thanks!

In central administration you go to "Application Management" then "Manage service applications" , "User Profile Service Application" , "Configure Synchronization Connections" and there you can create a new connection. After that you can start a sync and it should pull in the accounts from both or more connections.

To authenticate users in many ADs, you have to implement ADFS services in each domain and configure your SharePoint Application with the Federation Authentication mode. User Profile Service only sync users' profile information for you but can't authenticate users. You can check it here.