Microsoft has released information on its Advanced Audit techniques used in its Microsoft 365 platform. The tools are impressive. First, it allows firms to retain audit logs in all Exchange, SharePoint and Azure Active Directory audit records for one year with the ability to increase that audit log retention for 10 years with a license add-on. This 10-year retention will allow firms to perform investigations and respond to regulatory, legal, and internal obligations. All other audit logs will be retained for 90 days as a default.