We will be bringing down Star Trek Online tomorrow, Thursday, August 16th, at 7AM PDT (click here to view in your timezone) for maintenance and to apply a new patch. Patch notes can be found here, and we expect this maintenance to only last for 2 hours.
Aaaaand no Fleet Tribble or testing reward doff yet, and no Commendation XP>Fleet Marks either.
Check your Fleet Starbase. In Ops by the entrance there is a console that will allow you to run Doff missions to trade 10k CXP for 75 Fleet Marks. If you cant find it walk towards the Duty Officer then turn around, you should see it glowing.