Thanks to your answer,but an export-function isn´t an enterpise archive and/ or an enterprise backup system. Currently we build this with 3rd Partysystems and long processes. This is more a manuell process with a lot of work.
So it will be great for an Enterprise Community tool to have an archive System. The communication for example as a legal requirement as a business communication like a letter or an email and so we have to archive it.
Moreover I look for logs of people, who confirm the network rules :)