First change to the zimbra user environment:

su - zimbra

List accounts

zmaccts
           account                          status             created       last logon
------------------------------------   -----------     ---------------  ---------------
abrechnung@example.com                      active      12/03/22 14:12            never
bewerbung@example.com                       active      08/02/20 11:54            never
info@example.com                           lockout      10/19/23 13:44            never
js@example.com                              active      02/10/13 10:06   09/05/24 21:00
 
           account                          status             created       last logon
------------------------------------   -----------     ---------------  ---------------
admin@example.local                         active      01/15/13 20:09   09/01/24 09:11
galsync.xxxx@example.local                  active      01/15/13 20:13            never
 
                                 domain summary
 
    domain                  active    closed    locked    maintenance     total
-----------------------   --------  --------  --------  -------------  --------
example.com                     30         0         0              0        31
example.local                    6         0         0              0         6

Activate account:

[zimbra@mail ~]$ zmprov ma info@example.com zimbraAccountStatus active