I am using Win 7 Enterprise and IE 9 to connect to a new (4/5/2013) O365 SharePoint site. I can open a Word doc that has been uploaded there, but when I try to use the "Edit in Word" option, I get a pop-up screen with a highlighted row saying "Word has successfully opened your document" but Word 2013 never opens up. I also get a line at the bottom of the screen for the "Show All Content" option, as if there's a problem w/ https (certificate?) going to the cloud. The Word Web App tab in IE then hangs and has to be closed manually.
Anyone have any ideas?