When you have to connect Documentum with a non-supported LDAP, you usually forget about the configuration UI provided by DA as you have to do most of the work by IAPI/DQL.

However, if you want to add your LDAP to the list of supported servers, you can do so quite easily:

1. Create the necessary DirectoryType class with your custom ldap type (openldap in this case):

public enum DirectoryType{
  OPENLDAP("openldap"), SUN_ONE("netscape"), ACTIVE_DIRECTORY("microsoft"),
  ORACLE_INTERNET_DIRECTORY("oracle"), IBM_TIVOLI("ibm"), NOVELL("novell"),
  MICROSOFT_ADAM("microsoftadam");
//some other stuff you can check in com.documentum.ldap.DirectoryType from the dfLdapConfig.jar
}

2. ldapList component:

ldaplist_component.xml:

<pages>  
     <start>/custom/jsp/customldap/ldaplist.jsp</start>  
</pages>  
<nlsbundle>somepackage.LdapListNlsProp</nlsbundle>  

ldaplist.jsp:

<%@ taglib uri="/WEB-INF/tlds/customldap.tld" prefix="customldap" %>"  
...  
<customldap:customldapdirtypevalueformatter>  
<dmf:label datafield='<%=LdapList.DIR_TYPE_ATTR%>'/>  
</customldap:customldapdirtypevalueformatter>

customldap.tld:

<taglib>  
     <tlibversion>1.0</tlibversion>  
     <jspversion>1.1</jspversion>  
     <shortname>customldap</shortname>  
     <tag>  
          <name>customldapdirtypevalueformatter</name>  
          <tagclass>somepackage.CustomLdapDirTypeValueFormatterTag</tagclass>  
          <bodycontent>jsp</bodycontent>  
          <attribute>  
               <name>name</name>  
               <required>false</required>  
          </attribute>  
     </tag>  
</taglib>

Formatter:

public String format(String strValue){  
     String strDirType = getForm().getString("MSG_UNKNOWN_DIR_TYPE");  
     if ((strValue != null) && (strValue.length() != 0)) {  
          if (strValue.equals("netscape")) {strDirType = getForm().getString("MSG_NETSCAPE");  
          } else if (strValue.equals("microsoft")) {strDirType = getForm().getString("MSG_MICROSOFT");  
          } else if (strValue.equals("oracle")) {strDirType = getForm().getString("MSG_ORACLE");  
          } else if (strValue.equals("microsoftadam")) {strDirType = getForm().getString("MSG_MICROSOFT_ADAM");  
          } else if (strValue.equals("ibm")) {strDirType = getForm().getString("MSG_IBM");  
          } else if (strValue.equals("novell")) {strDirType = getForm().getString("MSG_NOVELL");  
          } else if (strValue.equals("openldap")){strDirType = getForm().getString("MSG_OPENLDAP");  
        }  
     }  
return strDirType;  
}  

3. ldapInfo component

ldapInfo_component.xml:

    <pages>  
         <start>/custom/jsp/customldap/ldapinfo.jsp</start>  
    </pages>      
    <nlsbundle>somepackage.LdapInfoNlsProp</nlsbundle>  

LdapInfo.class:

    public class LdapInfo extends com.documentum.webcomponent.admin.ldap.LdapInfo {  
        public static final String LDAP_DIR_VALUE_OPENLDAP = "openldap";  
    }  

ldapinfo.jsp:

<%@ page import="somepackage.LdapInfo" %>  
    ...  
<dmf:option value='<%=LdapInfo.LDAP_DIR_VALUE_OPENLDAP%>' nlsid='MSG_OPENLDAP'/>  

4. Final result: