Limit the People Picker in SharePoint 2010/2013 to a Specific OU or Domain

Latest

https://technet.microsoft.com/en-us/library/gg602075.aspx

https://thesharepointfarm.com/2014/01/powershell-for-people-picker-properties/

Found this good article on limiting the "People Picker"

Using powershell

Set-SPSite -Identity http://portal.contoso.com/sites/US -UserAccountDirectoryPath "OU=US,OU=SharePoint,DC=Contoso,DC=com"

Set-SPSite -Identity http://portal.contoso.com/sites/UK -UserAccountDirectoryPath "OU=UK,OU=SharePoint,DC=Contoso,DC=com"

Ref: http://www.tcscblog.com/2010/12/07/limit-the-people-picker-in-sharepoint-2010-to-a-specific-ou-or-domain/