zarafa-archiver -A
--local-only to zarafa-archiver tells it to archive only the primary stores that live on the server to which zarafa-archiver is connected. Unless configured otherwise in the configuration file, this is the server on which zarafa-archiver is run:
zarafa-archiver -A --local-only
zarafa-archiver for a specific user use the -u option:
zarafa-archiver -u <user name> -A
/etc/crontab :
0 1 * * * root [ -x /usr/bin/zarafa-archiver ] && /usr/bin/zarafa-archiver -A