The OWA Xpi Got lost off the file server and it wasn't compatible with
TB3.1. The install file was change to allow it to install in TB3.1
versions. No other changes were made at that time.
It isn't that no one want to maintain this xpi but without access to
an Exchange 2007 or 2010 mail server changes are very difficult for
anyone to do without pure guess work. The Webmail Author had wrote
that he has a new version written but has no way to test it prior to
completing his work so he can not release it. He need to see how the
interface works in order get things working correctly.
Part of the problem is that the Exchange systems admins are afraid to
allow anyone access to their servers. In my opinion without some co-
operation from them, the OWA xpi probably won't be updated for awhile.
Eugene