As with any form of user generated content (blog, wiki, calendar, amongst others), issues arise when multiple publish environments are used.
How to synchronize multiple publish environments so that all hold the same information as input by the user on one specific environment? For example, the selections made by users. There are various methods of dealing with this:
synchronize the multiple publish environments when necessary
return the user generated content from the publish to the author environment; from here propagate the user generated content to all publish environments as normal. See the section called “Replicating from Publish to Author” for further information.
The method selected should be carefully considered before and during implementation.
See Chapter 11, Social Collaboration in CQ WCM for further information.