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Lt. Commander
Join Date: Dec 2007
Posts: 120
# 2
04-19-2012, 07:37 PM
I'm not sure what you're referring to here, exactly. The Gamma Officer Exchanges (Bajor, Cardassia, etc.) will take any officer you can throw at them, with the exception of replicated holograms. If you're referring to the "Doff Grinder" missions at the academy, the ones where you slot 5 of one quality in to get 1 of the next-higher quality, than you can use any Doffs except the replicated holograms or the tier reward ones sold at the academies by Lt. Ferra / Stass.

Other than prisoner exchanges, I can't think of any mission that is supposed to exchange doffs that isn't guaranteed to at least give you something back. There are a few "grinder" ones that consume them to give you dilithium, but that's not really an exchange. If it is one of the Exchange missions that's not giving you a Doff back like its supposed to, I'd suggest filing a bug report.