'Connect-ExchangeOnline' cmdlet from the ARS MMC script module

If you are implementing your connection to EOL this way, then you need to load the module:

import-module exchangeonlinemanagement

i.e. in the code where you intend to use it

i.e. in the code where you intend to use it

I was using below code but still i'm unable to connect

#ExchangeOnline
[string]$exchangeOnlineUsername = ""
[string]$exchangeOnlinePwd = ""
[securestring]$exchangeOnlineSecurePwd = ConvertTo-SecureString $exchangeOnlinePwd -AsPlainText -Force
[pscredential]$exchangeOnlineCredentials = New-Object System.Management.Automation.PSCredential($exchangeOnlineUsername, $exchangeOnlineSecurePwd)

#Create session with exchange server
#$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri  -Authentication Kerberos -Credential $exchangeCredentials
#if($Session -ne $null){ WriteLog "Exchange session created." }
#Import-PSSession $Session -AllowClobber -DisableNameChecking

#Connects to ExchangeOnline
WriteLog "ExchangeOnline Connecting"
Import-Module "C:\Program Files\WindowsPowerShell\Modules\ExchangeOnlineManagement\2.0.5\netFramework\ExchangeOnlineManagement.psm1"
Connect-ExchangeOnline -Credential $exchangeOnlineCredentials
WriteLog "ExchangeOnline Connected"