AuditLog is a Domino server plugin that monitors and logs changes made to Domino databases, including documents, database properties, access control lists (ACLs), and schemas. It captures details of events like document creation, modification, deletion, database opening, and ACL/schema changes. Administrators can configure AuditLog to monitor specific databases and events, and send notifications for certain conditions. This allows monitoring of databases without modifying their source code, and provides an audit trail of all changes for security, compliance, and analytics purposes.