You can restore a single account by specifying -a
user@domain.com
Arguments (like which full/intermediate/redologs to restore) can be found in
CLI zmrestore Network Edition only - Zimbra :: Wiki
If -ca -pre restored_ is used a new account is created named
restored_user@domain.com
You could then grab out the material you want, imapsync, or choose to run the command without the new target/test account.
You could use:
CLI zmrestore restoreToTime Network Edition only - Zimbra :: Wiki and also have it restore to a new account.
zmrestore -s server.domain.com -a
user@domain.com -restoreToTime 20080512170331 -lb full-200xxxxxx -ca -pre restored_
Notice how I'm specifying a full on that line, the -restoreToTime option replays redo log sequences until time specified. When using this command, use the -lb argument to specify a full backup that took place prior to the time of the backup you wish to restore.