In July 2017, MGM Resorts discovered a data breach of one of their cloud services. The breach included more than 10M guest records with 3.1M unique email addresses stemming back to 2017. The exposed data included email and physical addresses, names, phone numbers and dates of birth and was subsequently shared on a popular hacking forum in February 2020 where it was extensively redistributed. The data was provided to HIBP by Under The Breach.