Portal Site Library
The Portal Site Library stores page related web content items. The Portal Site Library, and related views in the authoring portlet, are only visible when managed pages is enabled.
Virtual Portal Isolation
When managed pages is disabled, web content is shared between all virtual portals. However when managed pages is enabled, each virtual portal has its own unique and isolated workspace for web content. Before the migrated web content can be accessed from a virtual portal with managed pages, it must be syndicated from the base portal. Syndication between virtual portals is no different to syndication between stand-alone servers.
Parent topic: Migrating from Web Content Manager version 6.1