Need to know if there a way to capture traffic passing through our sensors as plain text (Not encrypted) ? since we have upload the encryption Key on the Manager.
I'm not sure if this is what you are looking for exactly, but this could be of some help: How to perform Packet Capturing on the Network Security Platform Sensor
This is probably best answered by Support (if possible), because its like the age old question "What came first the Decryption or the packet capture?"
I think support might be able to shed light on the order of operations here.