Exchange Server 2013 or 2016 redirects to Exchange 2010 for OWA, Outlook on the web, and ECP - Exchange | Microsoft Docs
Setting Up Microsoft Exchange 2013 in Outlook (Windows) - IONOS Help
Outlook 2013 and Exchange 2016 "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action" - Server Fault
Outlook 2019 setup for Exchange 2013 mailboxes
Outlook Security Alerts after Exchange Server 2013 Installation