We're currently trying to test out online certificate enrollment on a Juniper SA 2500.
I believe the version of Junos running on the SA is 7.1r11. None of the documentations mention SCEP per se, rather I noticed the use of OCSP which led me to believe that Junos 7.1 did not support SCEP at that time.
Further research revealed that the documentation for Junos 11 and 10 made mention of SCEP.
Still, I am curious to know what was the first generation Junos that supported SCEP