DavMail can be used with any POP3/SMTP client by adjusting the following description designed for Thunderbird
Edit common name and Exchange mail address:
Choose POP as server type, located at localhost:
Populate in and out login names with Active Directory account name, i.e. domain\account
Edit account name (email address by default):
Finish:
Create a new outgoing mail configuration under account settings:
Server name is localhost, edit port according to DavMail settings. The connection must use authentication with Active Directory account and encryption is not needed.
Proceeed to Thunderbird calendar setup