LDAP schema attributes for Outlook Express address book

[ATC]

This article describes the technical stuff we needed to sort out in order to set up an OpenLDAP server that Outlook Express could use to find/verify email addresses.

It does NOT cater for every possible scenario, and you have to substitute the data with your own where appropriate. "dc=atc, dc=no" refers to our internet domain "atc.no" but you can choose to model your LDAP directory in a different way.

[ATC]

First, download and install the newest version of openldap, plus the client and servers RPM. If you don't use RH Linux, download and compile the appropriate tarball.

Edit /etc/openldap/ldap.conf: (substitute with your data)

BASE    dc=atc, dc=no
HOST    ldap.atc.no
PORT    389

Edit /etc/openldap/slapd.conf, set the following:

suffix          "dc=atc, dc=no"
rootdn          "cn=floyd, dc=atc, dc=no"
rootpw          xxxxxxx (cleartext password)

Start your DLSP server:
/etc/rc.d/init.d/ldap start

Now you have to manually add the root entry to your LDAP directory. Create a file called "ldif" and substitute with your data:

dn: dc=atc, dc=no
dc: atc
o: Ano-Tech Computers
objectclass: organization
objectclass: dcObject
dn: cn=floyd, dc=atc, dc=no
cn: floyd
sn: floyd
objectclass: person

Now run:

ldapadd -D "cn=floyd, dc=atc, dc=no" -W < ldif

For manually testing and editing directory contents, download "LDAP Browser/Editor 2.8.1" from http://www.iit.edu/~gawojar/ldap

These are the attributes Novell use in their NDS, I found that Outlook Express understands quite a few of them:

# SCHEMA: inetOrgPerson
# audio
# businessCategory
# carLicense
# departmentNumber
# employeeNumber  
# employeeType
# givenName
# homePhone
# homePostalAddress
# initials  
# jpegPhoto
# labeledUri
# mail  
# manager
# mobile
# pager
# ldapPhoto
# preferredLanguage
# #roomNumber
# secretary
# uid
# userCertificate
# userSMIMECertificate
# x500UniqueIdentifier
# displayName

# SCHEMA: resedentialPerson:
# businessCategory
# x121Address
# registeredAddress      
# destinationIndicator  
# preferredDeliveryMethod
# telexNumber
# teletexTerminalIdentifier
# telephoneNumber
# internationaliSDNNumber
# facsimileTelephoneNumber
# SA
# postOfficeBox
# postalCode  
# postalAddress
# physicalDeliveryOfficeName
# S
# L

source: http://www.novell.com/products/nds/schema/

Finally, here's how to add your LDAP server in Outlook Express:
Tools | Accounts
Add | Directory Service
your.ldap.server
Yes
[Finish]
Now open the properties, select "advanced" and specify the search base. I use "dn: dc=atc, dc=no"