Volume Licensing: The serial number is on your Adobe Open Options/Adobe Volume Licensing license certificate. In some cases, it's necessary to contact your Adobe reseller or Information Technology department to obtain this information. The serial number is also listed in the Licensing website (LWS). If you misplace your certificate, you can log in to the account and obtain the serial number for your order. (Note: You have to be listed as a contact on the account ID number to view the serial numbers on the order.)
Important: When you buy software through Adobe volume licensing, it's necessary to download it (the software) from the Licensing Website (LWS). You can also install the software using the CD or DVD that came with your volume licensing order. If your serial number doesn't work, you could be trying to use it to activate a retail or trial version of the product.