Unless you are trying to join Windows 8.1 Pro desktops to a new Windows Essential 2012 server. Two of them went just fine and dandy (other than the transferring of the profile crap from the local logon over to the new on one of them). Now, the third one is another matter. It has Media Center on it (did i mention that it was also a Windows 8.1 Home that was upgraded with the Pro Pack) and every time you go to http://servername/connect and use the connector it tells you that it can't find the domain. Spent the last 5 hours messing with them and I've got to get back up again in about 4 hours to get ready to take drive my wife to work. Hit every technet article I could find and none helped. Think I'm just going to save the Quicken Data and his photos/documents over to the external hard drive and install that piece of junk HP Windows 8.1 Home again and this time he's NOT getting the Media center installed. Another identical computer to his (minus media center) worked just fine.