When attempting to log into the Automic Automation Engine with an LDAP user, the user will be unable to authenticate if the AD password is greater than 32 characters.
There is a 32 character limit on password authentication, even with a LDAP user.
Release : 12.3
Component : AUTOMATION ENGINE
As a workaround, you can:
1.) Keep the passwords under or equal to 32 characters.
2.) Use SAML for authentication.
3.) Use local users for authentication.
This behavior is fixed in the following releases: