How to add an email field to a user in LDAP?

Question

LDAP

Installed slapd, use phpLDAPadmin for management
Added users
here is an example user

# Entry 1: uid=test,ou=People,dc=ldap,dc=qbik
dn: uid=test,ou=People,dc=ldap,dc=qbik
cn: testuser
description: User account
gecos: test
gidnumber: 10004
homedirectory: /home/test
loginshell: /bin/bash
objectclass: account
objectclass: posixAccount
uid: test
uidnumber: 10015
userpassword: {SSHA}waNDaGkiAelA8J9Yk4yAiRZhffJvkP6L

How can I add the user information about his e-mail address?
The list of attributes that can be added only includes host, localityName, organizationName, organizationalUnitName, seeAlso

Answer 1

0)Add objectclass inetOrgPerson,top to user
1)You can install Apache Directory Studio™ and do everything in it
2)how was phpldapadmin installed?