Exchange administrators can really take advantage of the Exchange Management Shell for the administration of their messaging infrastructure on-premises or in the cloud. Here is a reference to the Exchange 2016 Powershell Cmdlets.  For some older links on working with PowerShell and Exchange, I really liked this quick reference sheet from Exchangepedia.com that describes the most commonly used Exchange 2007 shell cmdlets and is still relevant today. And then over at MSExchange.org I always liked this 5 part series on PowerShell 101 for the Messaging Administrator.  As always, the free sample PowerShell scripts for Exchange over at ExchangeServerPro.com is a must have link in any Messaging Administrators toolbox. Finally, we cannot forget TechNet which has a list of all the Exchange 2016 PowerShell cmdlets.