IAS Log File
IAS can create a log file based on the data returned by the network access servers. This information is useful for keeping track of usage and correlating authentication information with accounting records (for example, to discover missing records or instances of over-billing).
IAS supports two formats of the log file: IAS format and database.
Database format allows you to keep track of a predetermined set of attributes, and IAS format is more detailed and can contain information about all attributes.
Use database format if you want to import the data directly into a database. The IAS format can be used if you need to record more detailed information than the database log format allows.
The IAS log file contains all the IAS user-related events. IAS service and system-related events are recorded in the Event log files.