If you are referring for IdentityIQ password policy for expiration, check under Global Settings–> IdentityIQ configuration → Password Configuration where you can find a password policy related expiration dates.
Documentation
Daysuntil expiration for generated passwords–usedwhenanadministratorresets auser’s password
through the Identity Cube’s Attributes page. This option sets the password expiration date by adding the spe
cified number of days to the current date. The user is required to reset their password the first time they log into
IdentityIQ on or after that expiration date