Random LDAP auth problem

[gob]

Hi

I've had two agents suddenly not be able to log into Znuny after it has worked fine for a few years. Seems to be no logic why these two cannot log in - "Login failed! Your user name or password was entered incorrectly."

We are using Azure AD >> Azure AD Domain Services with LDAPS.
I can bind to LDAP using the creds used by Znuny and search for the agents OK.

These agents can log into other systems using the same LDAPS service using the same password so we assume it's not a password problem.

I have disabled 2FA for those agents and set znuny not to require 2FA.

I guess I am after the best troubleshooting steps to get to the bottom of this.
I've scoured all the logs in /var/log and var/log/apache2 but there doesn't seem to be any reference to the failed login attempts.

Any advice on next steps?
thanks

[root]

Hi,

Increase MinimumLogLevel and probably change the debug in Kernel/System/Auth/LDAP.pm

$Self->{Debug} = 0;

and set it to 1.

But don't keep this setting for ever.

- Roy