Does not work with OWS (microsoftonline.com) Rated 1 out of 5 stars
As two other reviewers have noted, this plugin does NOT work with microsoft online (online web services).
So if you domain is hosted with microsoftonline.com you are not going to be able to use this plugin to access your Exchange calendar.
I have both pidgin (domain/username) and thunderbird working with Microsoft Online, but there are no instructions to make this work with microsoftonline.
Thunderbird mail using red001.mail.microsoftonline.com to connect.
Pidgion uses pool1.oconline.microsoftonline.com to connect... (I posted the instructions to make this work here -> http://sourceforge.net/projects/sipe/forums/forum/688534/topic/4628665 )
But without knowing the instructions and without know the server name (I tried red001.mail and pool1.oconline) and how they want the connect (what are the bind lines needed?) It does not appear this plugin will work with Microsoftonline services.
Thanks for your bug report. I have filed it in the bug tracking system at <https://bugs.launchpad.net/lightning-exchange-provider/+bug/819558> and will update it there as I try to fix the bug.