Contoso, Ltd. Recently merged with Fabrikam, Inc. Each company has an Active Directory Domain Services (AD RS) domain. You are managing the SharePoint environment in each domain.
You need to enable users in the Fabrikam.com domain to access the Contoso SharePoint farm but prevent users in the Contoso.com domain from accessing resources in the Fabrikam SharePoint farm event if they have been explicitly granted access to a site.
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