Enable-WSManCredSSP -Role Client -DelegateComputer * -Force
Set-ItemProperty HKLM:SYSTEMCurrentControlSetControlLsaCredsspPolicyDefaultsAllowFreshCredentials -Name WSMan -Value WSMAN/*
Set-ItemProperty HKLM:SYSTEMCurrentControlSetControlLsaCredsspPolicyDefaultsAllowFreshCredentialsDomain -Name WSMan -Value WSMAN/*

Enable-PSRemoting -Force
Enable-WSManCredSSP -Role Server -Force

Enter-PSSession SPServer -Authentication CredSSP -Credential "DOMAINusername"

Add-PSSnapIn Microsoft.SharePoint.PowerShell

Get-SPSite