Thunderbird with Microsoft OWA in Ubuntu 11.10

So, you as I are tired of Evolution's problems in Ubuntu 11.10?
Move on to Thunderbird...
To have it working with Microsoft OWA following the these steps:

Install DavMail

Download and install DavMail. It will act as a proxy between Thunderbird and your Microsoft webmail.

Configure DavMail

Some tips: 

• Exchange 2003: https://mail.company.com/exchange/
• Exchange 2007 Webdav mode: https://mail.company.com/owa/
• Exchange 2007 EWS mode: https://mail.company.com/owa/
• Exchange 2010 EWS mode: https://mail.company.com/owa/
• Exchange 2010 EWS mode with unsupported authentication form e.g. Windows Live login:https://mail.company.com/ews/exchange.asmx

In my case as I'm behind a proxy I had to mark the option "Use system proxy settings" in the Proxy tab:

Click save then you should see a message in your system tray, saying that DavMail is correctly configured.

Configuring Thunderbird

In Thunderbird main window click menu File > New> Existing Mail Account.

Fill the next windows with your credentials:

Click "Continue", 

then manual config and change the properties to:

• Incoming:
• Server hostname: localhost
• Port: 1143 (if you didn't change this value in DavMail)
• SSL: None
• Authentication: Normal Password
• Outgoing:
• Server hostname: localhost
• Port: 1025 (if you didn't change this value in DavMail)
• SSL: None
• Authentication: Normal Password

Re-test and Create Account and be happy.