These features are removed from 7.0 .. They are no longer going to provide those features. It's in the release notes for 7.0 under "More About ZCS 7.0 Features".
Code:
Migration of Notebooks to Briefcase
In ZCS 7.0, the Notebook application has been removed. When users log into
their accounts for the first time or receive an email message after the upgrade
to ZCS 7.0, their Notebook folders and pages are migrated to folders in their
Briefcase application.
The folder structure and file names do not change. The Notebook pages can
be edited in Briefcase using Briefcase’s document editor. The migration
preserves all the revision history, if it was available, including the revision date
and user information. Shared folders are also preserved.
Note: The spreadsheet and slideshow functions are no longer available
It is highly recommended to create a backup of the mailbox before upgrading
to ZCS 7.0. In a rare case when the migration has not processed all the
Notebook pages in the mailbox, the old Notebook items can be retrieved from
the backup and manual migration can be attempted on the backup data.
The system wiki account is no longer used. If there is active content in the
mailbox of the system wiki account, log on to the wiki account after the
upgrade so that the Documents Notebook pages are migrated to Briefcase, as
the old Documents Notebook content shared with users will not be available in
ZCS 7.0
none of our users are missing it - I don't even think they even knew it was there before..