The MIM Reporting service automatically installs management packs to create a number of reports. At http://bit.ly/MIMMOOBReports, the default reports are described, but we have the information copied here for your convenience:
The Group Membership Change report: This report provides key information about group membership modifications in MIM, including the user account that approved the group change, the type of change, and any related requests or policy rules related to this change.
The Set Membership Change report: This report provides key information about set membership modifications in MIM, including account information about the user who joined or left a set, approvers (if any), and any related requests or policy rules related to this change.
The Group History report: This report provides information about changes to key attributes on group resources in MIM, including the group filter, owner, type, domain, and membership.
The Management Policy Rule History report: This...