People Picker from Non trusted domain to trusted domain

Reference# http://blogs.msdn.com/b/jorman/archive/2011/02/16/people-picker-why-don-t-you-trust-me.aspx?Redirected=true

Password which I have used to set the AppPassword on all the 4 servers
We can get the binary value of the password in the registry here HKEY_Local_Machine\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\14.0\Secure - AppCredentialKey  :  REG_BINARY


• Using STSADM we can configure which forests and domains are searched for accounts by setting the peoplepicker-searchadforests property. The best part is that we can supply a username and password for a trusted domain.
• SharePoint doesn’t allow you to store this username and password in plain text on the server. So you will have to configure a secure store. If you skip this step, configuring the search account for trusted domains will always fail with the following message - Cannot retrieve the information for application credential key.
• To create a credential key you will have to use the following command.
stsadm -o setapppassword -password <password>
This command has to be executed on every server in the farm.
• Now you can configure the forests and domains you want to search using the following command.
stsadm -o setproperty -url <web application url> -pn peoplepicker-searchadforests -pv forest:<source forest>;domain:<trusted domain>,<trusted domain>\<account>,<password>

You can combine any number of forests and domains, but you need to specify at least one. You also need to include all forests and domains in one statement because every time you execute this command it will reset the current settings.