Set up a server from scratch

Hi everybody,

my Lion server encounters several problems. There's frequent issues with the password in CalDav and CardDav (Error 403), the fileserver is slow, server.app tries to read the alerts list endlessly, mail invitations from iCal are only sent from time to time and the push notifications don't work at all. Some of it may be from the migration, most is probably because I started with SL server and had little knowledge. I wouldn't expect the migration to ML to improve things so I'm thinking about starting new.

I have only a handful of users and could recreate them without too much hassle. But would it still make sense to keep the OD backup and restore it after setting up the system? Could I keep the service data like contacts and calendar entries and which directories would I have to save for that? Or should I make local backups of that data and add it later from one of the clients? And will iCal then send out hundreds of invitations for meetings in the past?

Will I be able to reuse the Apple cert for the push notifications? Will it just be reinstalled from my Apple ID?

Any help is greatly appreciated.

Martin