Add Object Class

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
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I am working on horde and iredmail LDAP integration. I want to add objectClass turbaContact and calEntry for every existing user and all new users that will come in the future when adding user account using iredadmin. Can anyone assist me on how to go?