Active Directory Port Settings
With the latest release of Proofpoint Essentials customers now have the option to choose additional connection options to their Active Directory (AD) sync configuration
Customers can specify what port and encryption level is used to connect to their AD servers
636 (LDAP over SSL)
This is a secure connection over port 636. Commonly known as LDAPS
TLS is not required to be enabled for this option
Connection over port 389. This requires TLS 1.2 to be enabled
Connection over port 389. This requires TLS 1.1 to be enabled
Connection over port 389. This plain-text encryption and not secure.
Please be aware of the risks involved in using plain-text encryption.
Note: The default setting is TLS 1.2, all existing accounts will default to this option unless otherwise changed