In my time in the navy (long time ago) we had ‘undress blues’ for admin areas. I would think most other branches still do also.
I always thought ‘flight suit’ was uncalled for, unless on stand-by status or scheduled to fly. There were better suited uniforms for admin positions.
Some people may criticize this move but, as a retired AF officer, I always thought that arbitrarily making military wear fatigues was kind of a sham. If you’re in combat, deployed, or have a job where it makes sense—then absolutely. If you’re in CONUS, working in an office, then what is the point? Other than “solidarity” with those who are deployed, I can’t think of one.