I am really at my wits end with this and have been searching for a solution to no avail. We have a lab of 20 iMacs with a local administrator account. We install all the software that students will use, launch each application and enter serial numbers and information. Then we bind the machines to Active Directory. Students come in and can log in with no problem whatsoever but when they launch an application for the first time, it prompts them for the serial number. Since we cannot give this information to students, we have to manually enter it on the computer and waste class time. If the student does not get the same computer during the next class, we have to repeat the process and manually enter the serial numbers again. I can't find any information online about this issue and how to fix it. Does anyone have any suggestions that I can try?