PowerShell 5.0 released, but do not install that on Microsoft Exchange!

Abstract: Microsoft released Powershell 5.0 (Windows Management Framework) but it isn´t supported (yet) on any Microsoft Exchange server.

So if you check the Microsoft Exchange Support matrix here, you can see that for example Microsoft Exchange 2016 supports only Powershell / Windows Management Framework 4.0 and not the version 5.0.

Update:

If you wish to find out which powershell version is currently installed use:

$PSVersionTable.PSVersion

Inside a powershell command prompt