Identity Portal has a couple different logging locations. This document discusses these logging options.
Release : 14.3, 14.4
Web Client Logging:
Allows Logging on a Per 'client' - this will generate additional detail about work specified users perform in Portal. Useful if specific users are having a problem, or when troubleshooting new functionality.
2 System > Debug:
Increases overall logging written into the Portal logs to DEBUG level.
Writes DEBUG level logging specifically for the selected Connector.