It was Bulgakov who was sent to notify Augustus III about the demise of Empress Elizabeth. A year later, he was dispatched to Vienna to inform Maria Theresa of Austria about the coup d'état that brought Catherine II to the throne.
Bulgakov was tasked to convey news of Empress Elizabeth's passing to Augustus III, a year later he was sent to Vienna to inform Maria Theresa about the coup that led to Catherine II's ascension to the throne.