Try this:
Restoring Individual Accounts on a Live System
Use the zmrestore command to restore one or more selected accounts. In the event that a user’s mailbox has become corrupted, you might want to restore that user from the last full and incremental backup sets.
Note: You can also restore one account at a time from Accounts on the administration console.
To restore using the CLI command
1.
To put all accounts into maintenance mode, from the command line, enter zmprov ma zimbraAccountStatus maintenance
The maintenance mode prevents delivery of new emails during the restore. Otherwise, the emails would be overwritten during the restore process.
2.
Run the zmrestore command to restore the accounts. Use commas between accounts.
zmrestore -s <server> -a (account@abc.com,
account@abc.com
3.
Put all accounts into active mode, from the command line, enter zmprov ma zimbraAccountStatus active