Configuring ENS for your On-Premises deployment in a 3-step process.

You must first configure CNS and download the ENS configuration files, then install ENS2, and finally configure Boxer for On-Premises.

You must also ensure that the ENS server certificate is available on the user's Exchange server. See #GUID-B1DFBBE3-97A3-4467-BE30-87C90DE2D729.