is there a shuttle service from 1840 Corporate Blvd to Lenox Square?

Yes

I'm not sure, and I hear their Marta system is terrible. We drove. I'd Uber if you need to get there.

I really doubt it

Uber If you need but if not try bus or shuttle

I have no clue. I advise you check online or call.

There is Public transportation (Train, bus, or rail shuttles) They can get you all over the city.