When trying to log in to AEM, the error “User name and password do not match” is returned in a red box on the login screen.
When inspecting the network traffic via a browser debugger, a 403 error response is returned from an Ajax HTTP POST request to this URL:
The user name or password could be incorrect or there could be an error from the authentication handler during login.
To debug and fix this issue, follow the guide below:
I. VALIDATE THE USER NAME, PASSWORD, AND THAT THE USER EXISTS:
If the issue only happens with one or a few users, then it could be that the wrong user names or passwords are being used or the users don’t exist in AEM.
CHECK THE PASSWORD:
VALIDATE THAT THE USER EXISTS AND RESET THE PASSWORD:
II. Analyze broken authentication handling
If none of the above solves the problem, then:
Log in to the AEM server’s OS.
Tail or view the error.log file.
View the updates to the log while attempting to log in to AEM.
If any errors or warnings are logged, then analyze those warnings. If nothing is logged, then enable a debug log with these settings:
Log Level: Debug
Log File: auth-debug.log
At this point, if you are unable to analyze the log messages, and find the root cause, then contact AEM Customer Support