Enter your and the Request Code you noted earlier. Click Generate to receive your unique Response Code . Finalize Activation (Offline) :

Since the public-facing response code website is down, standard web browsers cannot generate it. You have two options to convert your Request Code into a Response Code:

On the activation page, click and sign in using your Adobe ID credentials.

Open Illustrator. The software will launch immediately without triggering the offline activation screen or asking for a response code. Important System Compatibility Notes

Practically, the safest approach is to use a clean virtual machine with an older OS (Windows 7 or macOS 10.12) and Adobe’s last-known working offline activation procedure, as the response code algorithm remains deterministic. Alternatively, users can request a “replacement serial” from Adobe support, although success is rare.

If you've followed the standard offline activation process and still encounter issues, try these advanced solutions.