Answered
We have a set of reviewers. I create a 2-page PDF document and initiate a shared review through Acrobat X.
Some with Acrobat X can review, comments, and publish comments just fine.
Other reviewers with READER 9 cannot join the review. The can make comments, however there is NO option to Publish Comments.
How can the users with Reader 9 join the review and publish their comments.
To recap, ideally all recipients of shared review PDF should have permanent or temporary access to Acrobat Pro. If not, the review initiator will have to facilitate shared review.