The access to the address book is only avaiable within the ETH network (including VPN)

To add the ETH address book to your thunderbird client carry out the following steps:

• Open your thunderbird client

• Go to Settings - Composition - Adressing

• Tick Directory Server

• Click on Edit Directories... an Add

• Add a new server as follows

• General:

• Advanced:

• Click Ok

Done. That's all.