By default, SAP ASE does not log auditing events. However, you can use sp_configure parameters to specify whether SAP ASE is to log auditing events, such as logins, to the SAP ASE error log and to the Windows event log.
sp_configure "log audit logon success", 1
sp_configure "log audit logon failure", 1
sp_configure "log audit logon success", 0 sp_configure "log audit logon failure", 0
For more information about sp_configure, see the System Administration Guide: Volume 1.