beckynet
I actually use a SME 8.1 with zarafa in db mode enabled.
I want to make first a Full Backup of my SME 8.1 and restore to SME 9.
I've read How to install Zarafa on SME 9 http://wiki.contribs.org/Zarafa_on_SME_9 but nothing is write on How to do after a Full restore.
Following the same install instructions should be appropriate.
Note that after any sme server (full) Restore to a newly installed operating system of sme server OS, you need to reinstall any add on contribs.
The database & configuration for the contrib(s) is part of the Restore, so the newly installed contrib(s) should utilise the restored data & configuration settings.
This assumes that the contrib conforms to sme standards and that there are no significant differences between the contrib versions ie the contrib version running on the old (sme8.1) & new (sme9.0) OS versions.
I strongly suggest you do a test Full Backup of 8.1 & a test Full Restore to cleanly installed sme server 9.0 OS (meaning with no extensive configuration done), discover any issues & find suitable fixes if necessary, before doing an upgrade of your production server.