The server mode Fortimail is set up and webmail users can access the domain address book however users using IMAP via Thunderbird or another e-mail client also want Address Book access.

Open up the Address Book in Thunderbird and create a new LDAP directory: File –> New —> LDAP DIrectory

Populate the appropriate settings based on the settings in the below screenshot. It would be advisable to use SSL for connections over the internet.

In the offline section click Download Now, if you get the “Replication Succeeded” message then all should be configured correctly. You can now try look up one of your entries.