Microsoft disclosed a security breach caused by a misconfigured internal customer support database that led to the accidental exposure of 250 million customer support and service records. Microsoft didn’t get into details such as the number of records exposed, the type of database that was left unprotected. The records that weren’t properly anonymized exposed customer email addresses, IP addresses, locations, CSS claims and case descriptions, Microsoft support agent emails, and internal notes marked as “confidential”” Microsoft also shared in their disclosure that the company is taking measures to prevent future incidents involving customer data.”
Source: https://www.bleepingcomputer.com/news/security/microsoft-exposes-250m-customer-support-records-on-leaky-servers/