To access objects in other databases or on linked servers you must comply with the following rules:

• You must set the LinkedInTransaction table property to No in order to use a view referring to objects outside of the current database. The ability to modify data in these objects is dependent on the data providers that the objects refer to.

• You must be a member of the db_owner fixed database role in the current database to access objects in other databases or on linked servers.

• All security permissions for objects in another database or on linked servers must be granted outside Microsoft Dynamics NAV to the appropriate SQL Server logins.

• If a linked object refers to a view that accesses objects that are stored in another database on the same server, this view must be treated as though it were accessing a linked server.

• MSDN Link
• - http://msdn.microsoft.com/en-us/library/dd355092.aspx