I am evaluating your content manager module and am wondering if there is a way to restrict a user to only add content to an existing article rather than having the ability to edit the entire article that was approved previously? For example, when one portion of text is approved, a user can edit that text and remove content. We do not want this.

IC.

Are you refering to Advanced Articles module or Content Manager module?

if it is Content Manager, currently it does not support this feature to append content, however, any changes to the content is recorded in the version manager.