Location: On
the left window's Server tab, expand a server group and select a 
Server
Purpose: Specify the connection message and log settings at the Server level.
Log Settings
Folder to save log files
Type the path or browse to specify where you want to save the server's log files.
Log file format
Three types of file formats are available for the server's log file. They are: W3C Extended log file format, Microsoft IIS Log file format, and NCSA Common log file format. The server administrator can also choose no logging.
Specify how often you want the server to create a new log file. These log files will be stored in the Folder to save log files.
Never
Create a log file once, the first time you run the server.
Daily
Create a new log file every day.
Weekly
Create a new log file every week.
Monthly
Create a new log file every month.