Okay, I found php-ldap.i686 and installed it which gives php ldap support. This should work for the plugin, correct?
Also I just realized that I omitted that I am using the Simple LDAP Login plug-in, in my original post. I seem to be making some progress becasue now when I test the plugi-in I get a test result instead of a blank page. However, the test result is a failure, “your settings don’t seem to work yet or ….” In addition now when I attempt to actually open WordPress the logon page comes up with an error message that says:
ERROR: The username field is empty. This would seem to imply that the user credentials coming from Active Directory are not complete, or something like that.
Can anyone shed some light on this?