The Army Knowledge Online site lets Army personnel access documents, information and email from secure systems using a special card reader. Provided you have an account, you can access unclassified information from the AKO site, including your email, with only your username and password. With this information, you can access your AKO email over your iPhone, Windows Phone or Android phone. Because BlackBerry devices use an aggregator, Army regulations prohibit you from using it to access your email. Writer Bio
