Environment:---osTicket Version v1.9.14 (8b927a0)Web Server Software Apache/2.4.7 (Ubuntu)MySQL Version 5.5.50PHP Version 5.5.9-1ubuntu4.19I installed osticket in January and have been adding agents since then and all agents authenticate using AD. I also added a test user (username test.one) in January to test authentication. When adding a new user osticket would fetch the users details and fill in the blanks, such as email, first and last name.Recently I wanted to add a new user, username test.two, and osticket does not fetch the users details from the AD. Even if I fill in the details myself (that is username, first and last name and email) the user cannot log in.I have reinstalled the plugins HTTP Passthru Authentication and LDAP Authentication and Lookup (did that today) and I am still unable to get new users authenticate using AD.If I delete an old user say test.one and try to add as an agent. Osticket will fetch the details from the AD as I am creating the agent and the agent is able to authenticate using the AD.If I change the password of test.one from the AD the change is picked by osticket and only when the new password is entered is the agent able to log on. However I an unable to log on using test.two, even when I am sure of the password. There are no errors appearing in access.log but the systems log under the dashboard of osticket give the error -  Failed agent login attempt (test.two)Username: test.two Attempts: 3