About 2 or 3 weeks. For me it was 11 days after they received my rfe
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Application received: 10/02/13
Biometrics done: 11/06/13
1st E-REQUEST : 04/25/14
E-REQUEST RESPONSE:05/11/14
RFE UPDATE:05/20/14
RFE LETTER::05/24/14
RFE SENT::05/29/14
RFE RECEIVED: 06/02/14
DACA approval: 06/13/14
EAD RECEIVED:06/19/14👍😊😄