Email domains are configured in the Configuration → Domains section. This section already includes the domain created in the configuration wizard.
On the domain server, install the Kerio Active Directory Extension which is available for free at the Kerio Technologies website. This application extends the directory service by certain Kerio MailServer's features.
In the Kerio MailServer's administration console, open the section.
Open the domain created within the installation by clicking on the .
Go to the Directory Service tab and enter domain server's information. Enable mapping by checking the Map user accounts and groups from a directory service to this domain option. Select Active Directory as the directory service type. In the Hostname entry, specify DNS name or IP address of the domain server. Use the Username entry to specify a username with read and write rights for the Active Directory's LDAP database.
Use the button to test whether all parameters have been set correctly to allow Kerio MailServer connect to the Active Directory's domain controller.
Switch to the Advanced tab. It is necessary that Kerberos realm is defined in the Kerberos 5 entry on this tab. The upper-case is set automatically for the name.
Once mapping is set, open the section. User list will include all mapped users and one local account for Kerio MailServer administration.
The user groups can be mapped in a similar way as users. Groups are administered in Domain Settings → Groups.
Aliases ca be defined in the section.
Click on .
This opens a dialog where a new alias can be added. In the Alias entry, enter the * symbol. In the E-mail address textfield specify the address of the mailbox where any undeliverable email will be sent.
Once the alias is saved, you can test it by the button available in the Aliases section.