The sp_dbcc_configreport defaults parameter allows you to view the configured default values.
The defaults parameter is optional, and is ignored if dbname is not null. Valid values for the defaults parameter are true or false (the default). A value of true indicates that you want to display only the default on the configured values. A value of false indicates that you want to view all configured values.
sp_dbcc_configreport null, 'true'
sp_dbcc_configreport
sp_dbcc_configreport null, 'false'