Upgrade questions

Hi Guys, I was wondering if someone could give me a bit of advice please.

I have a COS6.7 (Community) setup which I now want to move across to COS7.2 (Business) and I have some questions (I have searched but haven’t found definitive answers to some things).

On the COS6.7 I have Zarafa Community (with the 3 free Outlook licences) installed before Tim’s app was available but using his instructions (that very, very long thread !!). This enabled me to use Outlook for 3 users and imap for the others.

1. Am I right in assuming that by moving to Zarafa Small Business I need to buy a licence for every user, even those that only need access to emails and nothing else via imap ?

2. As I still have 3 users that need to use Outlook (due to a specific in house purpose) does the Zarafa Small Business supplied by ClearOS still use the mapi connector for Outlook or is it now using just ActiveSync ?

3. Is it possible to backup the Zarafa mailstore (including attachments) from the Community version on the COS6.7 box and restore it all to the COS7.2 with Zarafa Small Business version ?

4. Finally, for now, am I right in thinking that I can backup the COS6.7 server using Configuration Backup and then restore it on the COS7.2 and basically everything that is configurable via the webconfig is backed up and then restored on the new system ? (I appreciate that any tweaking I have done I will have to repeat on the new server)

Many thanks in advance
Steve