To run Mozilla Thunderbird as client for MS Exchange 2010 server on Ubuntu 12.04, just follow the HOWTO I wrote for Ubuntu 11.10 with the exception that the SOGo extension is now available for Thunderbird 17 (default in 12.04).
To run Mozilla Thunderbird as client for MS Exchange 2010 server on Ubuntu 12.04, just follow the HOWTO I wrote for Ubuntu 11.10 with the exception that the SOGo extension is now available for Thunderbird 17 (default in 12.04).