Here is a picture of the first configuration screen that appears when you choose either the Configure LDAP Servers... button in the File → Import   > → Import from LDAP Server... dialog or the Settings → Configure KAddressBook... menu item.

KAddressBook's “Configure LDAP Server” dialog after choosing the File → Import   > → Import from LDAP Server... function and left clicking the Configure LDAP Servers... button.

If you have already configured one or more LDAP servers, use this screen to select the servers that should be queried when you search for a name or email address. Use the Add host... button to add a new server to the list of available LDAP hosts. Use the Edit host... button to reconfigure a server that's already on the list, and the Remove host button to delete an entry you don't need any more. The Reset button can be used to undo the last “Add” or “Remove” action performed. The “Defaults” button is inoperative in release 5.10.3. The rest of the buttons (OK, Apply, Cancel) have their ordinary functions: apply changes and exit, apply changes and stay here, and exit the dialog without making any changes, respectively.

When you choose either the Add host... button or the Edit host... button, the following dialog will appear.

KAddressBook's “Configure LDAP Server” dialog after left clicking either the Add Host... or the Edit Host... button.

The first four fields (“User:”, “Bind DN:”, “Realm:”, and “Password:”) will all be grayed out unless authentication is required. Obtain these credentials from the LDAP server's administrator. Enter the appropriate URI in the “Host:” field. The default values for “Port:”, “Size limit:”, etc. will work OK for most users. You can use the Query Server button to set up the “DN:” field. I have no idea what the “Filter:” field is for. If you figure it out, please let me know (davidbryant AT gvtc.com).

Use the “Security” section to specify the encryption method to use: “No” for an unencrypted connection, TLS for Transport Layer Security, or SSL for Secure Socket Layer. Use the “Authentication” options to specify what level of authentication the server requires: “Anonymous” for no name or password at all, “Simple” if “Bind DN” and “Password” must be given, and SASL (Simple Authentication and Security Layer) for the whole schmear (four data items). If “SASL” is chosen, use the Query Server button to set the advanced options for this host.

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