Do you know how to do a full backup of ALL users emails when using Google Apps Standard?
What about docs, calendars etc.?
Is it by any chance possibiity to automate it?
In order to do this you need to be able to use the Google Apps API (then you can write a script or something), which you don't get access to under Stardard.
So, not unless you open your chequebook.
You can enable imap and sync it either with another imap server or with maildir files.
Some tools: offlineimap mailsync imapsync isync . I've used offlineimap for imap<->maildir<->imap syncs.