Updated May 12, 2025: We have updated the content. Thank you for your patience.

Coming soon: ActorInfoString, a new audit log field in Microsoft Exchange Online (EXO) designed to improve the accuracy, clarity, and depth of your audit logs. ActorInfoString records the true user agent responsible for each audited event, giving security and compliance teams increased visibility into actions performed in your Exchange Online environment. This update builds on the existing audit schema by capturing more granular information about clients, devices, and applications involved in audited operations.