Determine the cause of a failed logon attempt in KCM Designer

The Audit log in Designer for Windows

1. Start Designer for Windows.
2. Login with a Designer user which has 'log on as administrator' permission.
3. Go to menu File -> Log on as Administrator.
4. Login with a Designer user which has 'log on as administrator' permission.
5. In the left pane, click on 'Audit Log Entries'.
6. In the right pane, you can now see the Audit Log entries.

The itprep.log file of KCM Repository server

1. Open itprep.log (<root>\KCM\Work\<version>\Instance_NN\designer\Log\<hostname>\ITPMDK [designer_01_<version>]\itprep.log).
2. Search for the keyword DES1133.

The cause wrong username (user does not exist) is logged as "Logon attempt on <username> failed, code 65537".
The cause wrong password is logged as "Logon attempt on <username> failed, code 65536"
When trying to logon with an user account that is locked out this is logged as "Logon attempt on <username> failed, code 655340"