I love it! When a new employee joins a company, usually there is a training program which helps the new employee get acclimated to the environment, culture and codes of conduct. Elon probably got his new email address and this was autogenerated from workday or whatever HR app is being used internally.
Nothing wrong with this. Question will be, what will those courses look like? The content will probably be the eye opening part for the new “Manager.”
Yes, Elon Musk has a no nonsense reputation. He is a bit quirky but very intelligent.
Most of his companies are lean on personnel. He hires capable people.