To download your aadhar card by Enrolment ID your should have your Enrolment slip.
1)Enter your enrolment number, date and time of enrolment slip. (1234/12345/12345 dd/mm/yyyy 10:10:10)
2)Enter your full name same on Enrolment slip and next enter your area pincode.
3)Enter your registered mobile number for one time password. Then enter your otp and get aadhar card. After print it and then you can use this one as a original.
if you are facing problem, you can download your aadhaar card from https://eaadhaar.uidai.gov.in/