0 - 2 of 2 tags for 8017

We are having an issue with users attempting to logon to the system using LDAP authentication.
They are able to logon using a set password with no mechanism chosen.
 
Any suggestions regarding resolution?

Our users have been receiving the [8017] The UserID, Password or Account is invalid error more frequently lately.  Normally, I can reset the password and they are fine.