LDAPS not working

Hi I have the following Problem our Windows Active Direcory Server was changed to explicid TLS connections only from port 389 to 636 last night. Starting this morning non of our users are able to login anymore this is the error that is shown.

Thu Oct 28 11:53:03 2021 [1524][-none-][FATAL] [LDAP ERROR][-1]Can’t contact LDAP server

Thu Oct 28 11:53:03 2021 [1524][-none-][FATAL] SECURITY: ldapauth: failed LDAP bind (login) by username, could not construct bind_user

Thu Oct 28 11:53:03 2021 [1524][-none-][FATAL] SECURITY: User authentication for username failed

Thu Oct 28 11:53:03 2021 [1524][-none-][FATAL] SECURITY: User authentication for username failed

Thu Oct 28 11:53:03 2021 [1524][-none-][FATAL] FAILED LOGIN:attempts[1], ip[1.1.1.1], username[username]

Does anyone habe a sugestion of why this is not working and where I have to upload the certificate to be used for authentication ?