I have purchased an Asus VivoTab Smart tablet that runs Windows 8 Pro. No luck to access our company's 2003 exchange server. No problem using iPAD and Android Nexus 7 to access. There are only five entries to enter. Following online suggestions of "case sensitivity" and enter upper lower case username/email address/domain name carefully, still no luck. When it does not link correctly, the error message is next to useless. Help!!