EXMON for Exchange 2013. identiy cached and online mode users . Powershell and Exchange help

Hello Experts,

I need to pull out a list of users in online mode vs cached mode from an Exchange 2013 CU8 organization. I was told to use get logon statistics, as per cmdlet below, however there is an error, and cannot be completed, see screenshot attached

Get-LogonStatistics -server servername| where {$_.ClientMode -ne “Cached”} | select-object FullMailboxDirectoryName,UserName,Windows2000Account,ClientMode,ClientName,ClientVersion,Identity | sort-object UserName -Unique| Export-Csv -Path C:\temp\UserCountservermail.csv -NoTypeInformation


Based on my additional research, we can user EXMON to trace this information, however I installed the tool on the exchange 2013 server, and cannot perform any task with this tool.

can someone help me either to fix the issue when I run the PowerShell to obtain the list of user, or indicate step by step instructions to use EXMON on Exchange 2013?

Is there any settings or registry key we have to add on the Exchange 2013 servers to run this tool? if so, any potential impact or performance degradation?
LogonStats.jpg