Exchange Web Services (EWS)

Hi all,

I have the script below that was working fine but recently stopped functioning. I am unsure if this is due to the deprecation of basic authentication or because Exchange Web Services (EWS) is no longer supported as it's a legacy client. The purpose of the script is to forward calendar invites to newly joined employees. Is there any other way to achieve this? Please guide me.(i am not using password in plain text like the below, i have encrypted it. just for understanding i have put password)

Start-Transcript -Path "C:\temp\transcript.txt"
$OU = "contoso.com/OU1"
$CSV = ".\userlist.csv"
$Users = Import-Csv '.\userlist.csv'
$MBX = '[email protected]'
$Items = 50
$DaysInTheFuture = 300
$Now = [System.DateTime]::Now
$Then = [System.DateTime]::Now.AddDays($DaysInTheFuture)
$username = "[email protected]"
$password = "somepwd"
$TenantPass = $password | ConvertTo-SecureString -AsPlainText -Force
$EWSServicePath = 'C:\Program Files\Microsoft\Exchange\Web Services\2.2\Microsoft.Exchange.WebServices.dll'
Import-Module $EWSServicePath
$Service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService
$ExchVer = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP1
$Service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($exchver)
$Credentials = New-Object System.Net.NetworkCredential($username, $password)
$service.Credentials = $Credentials
 
#Setting up EWS URL
$EWSurl = "https://outlook.office365.com/EWS/Exchange.asmx"
$Service.URL = $EWSurl
$service.ImpersonatedUserId = New-Object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId ([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SMTPAddress,$MBX);
 
$folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Calendar,$MailboxToImpersonate)
$calendarFolder = [Microsoft.Exchange.WebServices.Data.CalendarFolder]::Bind($service,$folderid)
$calendarView = new-object Microsoft.Exchange.WebServices.Data.CalendarView($Now, $Then)
$calendarView.MaxItemsReturned = $Items;
$calendarView.PropertySet = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)
$findItemResults = $calendarFolder.FindAppointments($calendarView)
if ($findItemResults) {
   $FutureMeetings = @()
   Foreach ($CalItem in $findItemResults) {
      If ($CalItem.IsMeeting -eq $True) {$FutureMeetings += $CalItem}
   }
   if ($FutureMeetings) {
        $emaillist = @()
      foreach ($user in $Users) {
         $EmpType = $null
         $EmpType = get-qaduser $user.UserPrincipalName -properties employeeType | select employeeType
            If (($user.RecipientTypeDetails -eq 'UserMailbox')) { $emaillist += $user.emailaddress }
         }
      if ($emaillist.count -gt 0) {
         foreach ($item in $FutureMeetings) {
            [void]$item.Forward("shared meeting invite with you.",$emaillist)
            ("Date: "+$Now) | out-file ".\fwreport.csv" -append
            ("Addresses: "+$emaillist) | out-file ".\fwreport.csv" -append
            ("Subject: "+$item.Subject) | out-file ".\fwreport.csv" -append
            ("Start: "+$item.Start) | out-file ".\fwreport.csv" -append
            ("End: "+$item.End) | out-file ".\fwreport.csv" -append
            ("Location: "+$item.Location) | out-file ".\fwreport.csv" -append
            ("--------------------------------------------------------------") | out-file ".\fwreport.csv" -append
         }
      }
   }
}
Stop-Transcript