Sign Certificate assertion Expiry Age

Document ID : KB000072627
Last Modified Date : 06/03/2018
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When using a CSR with the Sign Certificate assertion, the signed certificate has a default validity for 5 years. Is there a config file \ property where we can change this number to something else(1 year, half year, etc)?
Enhancement being done for gateway 9.4(included in 9.3 CR2) to allow 'Expiry Age' parameter to be passed to the Sign Certificate assertion.