From Microsoft Watch: We asked and we received. Just yesterday, we wondered aloud when that elusive Office 2007 Beta 2 Technical Refresh (TR) build would appear. Now we know: Thursday September 14 at 9 a.m. PST. That’s when Microsoft is set to post the last public test build of its next-generation Office suite.Office 2007 Beta 2 TR is primarily a bunch of bug fixes. But there are a few final user-interface tweaks in there, too.