To enable audit logging, you will have to turn it on in your logging configuration. Both successful and failed Kerberos and SAML logins will be logged. For failed logins, there will be an additional sentence explaining why it failed. By adding the two lines, you will get logging in a similar pattern as the security logging in Jira (as Jira has the most precise logging of logins).
Logging will look like this:
This is done in Confluence by adding the following two lines below in the bottom of the file:
Log will be written to: atlassian-confluence.log
This is done in Jira by adding the following two lines below in the "# Security logs" section in the file:
Log will be written to: atlassian-jira-security.log
Similarly you may enable audit logging in other Atlassian products. Please contact us if you have problems setting this up and we will help you out.
This feature was added in version 3.5.15.