load powershell module for Exchange
$UserCredential = Get-Credential
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://EXCH01/PowerShell/ -Authentication Kerberos -Credential $UserCredential
Import-PSSession $Session
The command to import the Exchange modules is different for each version:
Exchange 2007
Exchange 2010
Exchange 2013 & 2016