Please let me know how to check APM user AD authentication failed logs. Not able to find user's AD authentication failed log details in /var/log/apm.1 file.
Just try with the logging levels
You can also configure a stopper or messagebox in the failback branch of the AD Authentication box.
Are you not seeing messages like this in your APM log?
AD module: authentication with 'username' failed: Preauthentication failed, principal name: username@domain. Invalid user credentials.