When trying to activate the license for Autodesk Infrastructure Design Suite Ultimate 2014, I recieve Error 123 ("The serial number you entered is not valid for the product you are trying to activate. Try again"). I've checked multiple times that this is the correct product serial number. In addition, I have tried getting the .lic file from the other registration route and using that to register but I have been unsuccessful so far.
You can use the online method to activate your license here:
Or you can can call Autodesk Product Registration and Authorization:
1-800-551-1490 > Option 1 (English) > Option 1 > (Stand-alone)
Asia / Pacific: 65.6735.5688
Europe / Middle East / Asia: 41.32.723.9595
You will need to provide your serial number and the request code.