How to change Device Identity Certificate(SCEP certificate)'s expiration date in OS X Server App(for Profile Manager)

Question

Now I'm trying to test "Update Profile" button(Settings > General > Profile > Device Management based on iOS 8.4) and whether update works well or not after Device Identity Certificate (SCEP certificate) was expired as below.

Screenshot of Update Profile button

Screenshot of Expiration Date

I verified that expiration date can be set in 3rd party SCEP server. But I can't find any settings for expiration date(at least a current day) from Server App of Mac OS X Server. (SCEP function is combined to Server App)

In this status, I have to wait for a year to see it from finishing a device enrollment.

I really want to know how to change SCEP certificate's expiration date even in source level.

Is there somebody can tell me how? Please help me.

Thanks.