[SOGo] Upgrade from 2.0.4b

Hi all,      I am currently using sogo 2.0.4b on SME server 8 for a while. I wish to upgrade sogo to the lastest version. I read the wiki at http://wiki.contribs.org/Sogo#Upgrade. Can anyone confirm me that my old email and users account will still be available after I use following command?

[SOGo] samba-tool provision

I'm trying to understand how the ZEG appliance was originally configured. If I configure Outlook for the sogo1 user with the ZEG (2.0.5a), it connects with no problem. If I try to re-provision Samba4/Openchange and re-create the sogo1 Outlook profile, Outlook and/or Samba will crash every time.