For a time, Adobe provided a special "activation-free" version and unique serial numbers for existing customers to continue using their software legally. However, Adobe stopped providing these downloads and keys entirely in December 2019. Better Alternatives to Keygens
Historically, users were instructed to download a specific version of CS3 from Adobe’s site that used a unique serial number (e.g., 1302-1421-... ) that didn't require online verification. For a time, Adobe provided a special "activation-free"