Installed Pidgin from repository on Ubuntu 12.04...
Added SIPE plugin from here:
https://launchpad.net/ubuntu/quantal/amd64/pidgin-sipe/1.11.2-1ubuntu1
Project screen shots are here:
http://sipe.sourceforge.net/screens/
I was running a live DVD so even though newer versions were available it complicated the dependencies and I was in a hurry... so I loaded this version.
Under Basic Tab:
Listed SIP account as the username.
Login: Used my AD account and PW
Under Advanced I changed email address if different from login name to match my actual email address.
