New Aerangus Articulata and new grower

[jstern]

Hi there, new member here and a very new grower. I received an Aerangus Articulata from a friend who has been keeping it in her house for several months (she bought it at an orchid show some months back).

It's in a 4 inch plastic pot and she had it in a south facing, but not overly sunny window on a tray with all her other orchids.

Since receiving it, I put it in my office at work in a warm place that receives diffused light. It came to me with some new roots growing, but now it has black spots on the bottom and 2 leaves have dropped (it think one was due to sunburn, i originally put it in a sunny window).

I've been reading other posts about this orchid and am a bit discouraged and also confused. Should I mount it? should I mist it? should I treat it with something in case it has a fungal disease? or is it just unhappy?

I would really like to do right by this beauty, so if I need to take it home and put it in the bathroom or somewhere else more humid, I can, I just need some clarification on what the best thing would be for it...

Help! thanks! Jess