for ($i=1;$i -le 5;$i++) {
            try {
                Connect-ExchangeOnline -Credential $Credential -Verbose:$false -ShowProgress $false -Force -WarningAction silentlycontinue 6>$null
            } catch {
                if ($i -ge 2) {Write-Warning "Connect-ExchangeOnline Retry $i"}
                [float]$sleepTimer = [Math]::Pow(2,$i) + [float]((Get-Random -Max 1000) /1000 )
                Write-Warning "Connect-ExchangeOnline PS Remoting Error (retry: $sleeptimer sec): $PSItem"
                Start-Sleep $sleeptimer
                continue
            }
        }
        if ($i -ge 5) {Write-Warning "Connect-ExchangeOnline backoff retry timer reached."}