Function ProgressBar
{Param([double]$i,[string]$status)
    write-progress -activity "Converting DisplayNames to PrimarySMTPAddresses..." -status $status -percentcomplete $i
}

########CONSTANTS
$FILELOCATION = "Path to CSV File"
########

########MAIN
$groups = import-csv $FILELOCATION

#Create increment for progress bar completion rate.
$count = 100 / ($groups).count
$x=0

#Connect to Exchange Online.
$pass = cat c:\users\shmorris\securestring.txt | convertto-securestring
$mycred = new-object -typename System.Management.Automation.PSCredential -argumentlist "<CREDUPN>",$pass
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell -Credential $mycred -Authentication Basic –AllowRedirection
Import-PSSession $Session

foreach ($group in $groups)
{
    $managedByArray = @()
    $ownerString = $null
    try
    {
        $managedByArray = (Get-UnifiedGroupLinks $group.alias -linktype Owner).primarysmtpaddress
        foreach ($owner in $managedByArray)
        {
            $ownerString = $ownerString + $owner + ";"
        }
    }
    Catch
    {
        $managedByArray = $null
    }

    $group.Alias+","+$group.PrimarySMTPAddress+","+$group.DisplayName+","+$group.ExternalDirectoryObjectId+","+$group.WhenCreatedUTC+","+$group.ManagedBy+","+$recipientList >> GroupOutput.csv

    $x = $x + $count
    ProgressBar $x $group.Alias
}