I'm wondering how I can send away duty officers and bridge officers for dilithium. I remember having read about an assignment that will permanently remove a duty officer and grant dilithium instead, though I never encouterned this, and bridge officers have a dilithium value in their info field. However, I can't use the sell button at the doff and boff vendors.
Is there a mistake on my side?

I know if you discharge a DOff you get dilithium for it. You do that from the Duty Officer List tab. There is an assignment as well, but I can't remember the name. If I recall correctly you get it at Earth Space Dock, but it might not always be available.

As for Bridge Officers, I'm pretty sure you can't sell them for dilithium. The value you see in their description is how much it would cost if you purchased it from a vendor, not how much you would get if you sold it. Bridge Officers can only be sold for Energy Credits on the exchange (or traded t other players).

Thanks for answers, I feared I was missing something

The "Reassign Duty Officer" assignments were removed halfway through the DOff beta process in favor of the "discharge for Dil and Recruitment XP" feature.

The KDF still has the "Execute for Incompetence" assignments (which yield Dil and Development XP). Just about every KDF player I know has done this with a bartender or chef at one point.

Gym "These are the consequences of screwing up my food/drink order!" Quirk