A user created an encrypted backup of their iPhone on a Mac.

Forgotten encrypted backup passwords can’t be recovered.Reset All Settings(Settings > General > Transfer or Reset iPhone) clears the old backup password link, allowing a new encrypted backup with a new password on the same Mac.

Option B: Different Mac isn’t necessary.

Option C: Network reset doesn’t affect backups.

Option D: Restarting doesn’t clear the password.

Option A: Correct—resets backup access.References: Apple Support - "If you forget your encrypted backup password" (support.apple.com/HT205220).