acme.sh offers the following account management actions:

• Account registration
• Account email update
• Account key rotation / rollover
• Account deactivation

Each CA has its own account. Use --server <CA> to select which CA account to manage (see Server).

• Registration: use --register-account (see the corresponding CA wiki page).
• Email update: use --update-account with the -m <email> option.
• Key rotation: use --update-account-key and optionally specify --accountkeylength <length>.
• Deactivation: use --deactivate-account. ⚠️ This operation cannot be undone.