You're looking for information on Safe PST Backup activation codes. Here are some key points:
If you can’t afford an activation code right now, don't risk your security with a crack. Outlook has a built-in way to "back up" data manually: safe pst backup activation code hot
Most licenses allow 2-3 activations. Check the EULA. Stellar and SysTools allow deactivation from the old PC. You're looking for information on Safe PST Backup