A handful of options are available using the command line tool certify.exe. This can be found in the installation directory.
certify renew: renew certificates for all auto renewed managed sites, if they are due or have not yet been requested.
certify renew --force-renewal: As above but perform renewal for all auto renewed certificates even if they are not yet due.
certify list: list managed certificates and current running/not running status in IIS
certify diag: check existing ssl bindings and managed certificate integrity
certify importcsv: import managed certificates from a CSV file. See CSV Import for more details