From: DeskNow Knowledge Base
http://www.desknow.com/kb/

How to use a custom password for the SSL certificates
http://www.desknow.com/kb/idx/13/194/article/

If you decided to not use the default 'changeit' password when generating your SSL certificate, you will also need to tell DeskNow which password to use.

httpkeystore

This file is copied to C:\Program Files\DeskNow\conf\keystore ( /var desknow/conf/keystore ).

Edit the file server.xml (in the same folder), and after the text keystoreFile="conf/keystore"

add the following:

keystorePassword="mypassword"

imapkeystore

Add this line to Mail.cfg:

EmbeddedServer.IMAP.SSL.KeyStorePassword "mypassword"

smtpkeystore

Add this line to Mail.cfg:

EmbeddedServer.SMTPSSLKeyStorePassword "mypassword"

pop3keystore

Add this line to Mail.cfg:

EmbeddedServer.POP3SSLKeyStorePassword "mypassword"

After any or all of the above changes, you need to restart DeksNow.