I’ve read similar posts, but none stated the issue clearly. I’m attempting to open Office documents on a MyBookLive share via WD2GO, and get prompted for credentials repeatedly which don’t accept valid userid/password. In this example, I can mount the Share, navigate the directories, and Explorer can even preview the Excel file, but attempting to launch Excel causes the repetitive credentials box. I am using Windows 7 64-bit, with Office 2010. I’ve attached the credentials pop up box, as well as the Explorer screenshot that shows the preview of the Excel file. Any help is most appreciated.