This article helps you create a certificate request for a certificate nearing expiry or an expired certificate from EAC (Exchange Admin Center) or EMS (Exchange Management Shell) which includes all the required SANs. Applies to Exchange 2013/2016/20…
This article will guide you how to configure your Exchange server to use external DNS servers for external DNS lookups. This is for Exchange 2013 or higher versions. It is recommended to configure the DNS servers for flawless mail flow.