While CEO of ExxonMobil, Tillerson used an alias email address "Wayne Tracker" for eight years and sent thousands of messages. In response to a subpoena issued by the New York State Attorney General's Office (part of a state investigation into whether Exxon had misled investors and the public about climate change), Exxon produced about 60 emails associated with the "Wayne Tracker" account, but did not inform investigators that they were Tillerson's. ExxonMobil said the account was "used for everyday business" needs such as "secure and expedited communications" between Tillerson and top company executives.