EAC is web-based management console for Exchange Server 2013. URL controlled by IIS virtual directory named ECP on Mailbox server. External access requires configuration of external URL and DNS settings
Autodiscover is mandatory for Exchange mail clients since Outlook 2016. Certificate errors occur with non-public DNS domains like domain.local. Microsoft enforces certificate validity in Exchange 2013+. Third-party CAs often deny SANs for non-public domain names
Exchange Server 2016/2019 uses Front-End and Hub Transport Services. Front-End Transport listens on port 25 for external SMTP connections. Hub Transport listens on port 2525 for Backend services
Exchange Server has six types of transport logging for monitoring and troubleshooting. Transport pipeline manages mail flow through services and connections. All transport logs are located in TransportRoles folder under default installation
Autodiscover enables client applications to configure themselves with minimal user input. Service retrieves configuration details using email address and password. Works for both inside and outside firewalls in resource and multiple forest scenarios
Install latest Windows Updates and join server to domain. Download Exchange Server ISO from official website. Install .NET Framework 4.8 and RSAT-ADDS feature. Add account to Schema Admins and Enterprise Admins groups