Starting next week, migrated pages from the old website that are of primarily historical value (e.g., pages related to inactive groups, historical events, etc.) will be moved to "archive" status.
All the pages will be accessible, but they will not appear in search results unless you have turned on the option to "Search archived spaces" (see image below). This should make it easier to find current material in the Member Portal.
For detailed instructions and more tips on searching, check out this page on how to search for content in the Member Portal.
Image: Turning on the option to "Search archived spaces"