Look for Publication
These are the options available on the Look for Publication page of the Create Pull Subscription Wizard.
Look at publications from registered servers
Select this option to view publications at registered servers.
Look at publications in the Active Directory or specify publication information
Select this option to view publications that are listed in Microsoft® Active Directory™. If allowed, you will be able to subscribe to publications listed in Active Directory. This option is for Publishers running SQL Server 2000.