I have been working my way through this quest line with no real issues until this step. I have had two exotic engrams appear to my character (Albeit ending up at the postmaster) and it hasn't checked off that step in the quest. Is the issue that I haven't actually picked them up myself while venturing in the open world/missions and them going to the postmaster is not registering as me receiving one?
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They have to be engrams you pick up off the ground (exotic catalysts count too)