Hello All,
Sorry my for my poor english.
We are user of ISP Zextras, but now we have to support a customer that has Zimbra OSE in his own server.
I want to minimize downtime for a migration from ZCS 6.0.6 to a ZCS 8.0.4 with 1200 accounts and 750Gb datastore
Import/export using ZxMigration seems to be a very slow process as I think I will have to wait exporting finish.
Is it possible to do this migration with ZxBackup?
1) Install ZxBackup on source server ZCS 6.0.6
2) Do a previous full scan and keep server running with realtime backup until the day of migration
3) Stop old server, point backup path of new server to path of old server and just start to restore backup on new server?
This way I´ll not have to wait for export downtime, just for import.
Any sugestions will be welcome! 
Kind regards