OnlineMeetingReport.ps1

function Connect-Exchange{ 
    param( 
    	[Parameter(Position=0, Mandatory=$true)] [string]$MailboxName,
		[Parameter(Position=1, Mandatory=$true)] [System.Management.Automation.PSCredential]$Credentials,
		[Parameter(Position=2, Mandatory=$false)] [string]$url
    )  
 	Begin
		 {
		Load-EWSManagedAPI
		
		## Set Exchange Version  
		$ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2013_SP1
		  
		## Create Exchange Service Object  
		$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)  
		  
		## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials  
		  
		#Credentials Option 1 using UPN for the windows Account  
		#$psCred = Get-Credential  
		$creds = New-Object System.Net.NetworkCredential($Credentials.UserName.ToString(),$Credentials.GetNetworkCredential().password.ToString())  
		$service.Credentials = $creds      
		#Credentials Option 2  
		#service.UseDefaultCredentials = $true  
		 #$service.TraceEnabled = $true
		## Choose to ignore any SSL Warning issues caused by Self Signed Certificates  
		  
		Handle-SSL	
		  
		## Set the URL of the CAS (Client Access Server) to use two options are availbe to use Autodiscover to find the CAS URL or Hardcode the CAS to use  
		  
		#CAS URL Option 1 Autodiscover  
		if($url){
			$uri=[system.URI] $url
			$service.Url = $uri    
		}
		else{
			$service.AutodiscoverUrl($MailboxName,{$true})  
		}
		Write-host ("Using CAS Server : " + $Service.url)   
		   
		#CAS URL Option 2 Hardcoded  
		  
		#$uri=[system.URI] "https://casservername/ews/exchange.asmx"  
		#$service.Url = $uri    
		  
		## Optional section for Exchange Impersonation  
		  
		#$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName) 
		if(!$service.URL){
			throw "Error connecting to EWS"
		}
		else
		{		
			return $service
		}
	}
}

function Load-EWSManagedAPI{
    param( 
    )  
 	Begin
	{
		## Load Managed API dll  
		###CHECK FOR EWS MANAGED API, IF PRESENT IMPORT THE HIGHEST VERSION EWS DLL, ELSE EXIT
		$EWSDLL = (($(Get-ItemProperty -ErrorAction SilentlyContinue -Path Registry::$(Get-ChildItem -ErrorAction SilentlyContinue -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\Web Services'|Sort-Object Name -Descending| Select-Object -First 1 -ExpandProperty Name)).'Install Directory') + "Microsoft.Exchange.WebServices.dll")
		if (Test-Path $EWSDLL)
		    {
		    Import-Module $EWSDLL
		    }
		else
		    {
		    "$(get-date -format yyyyMMddHHmmss):"
		    "This script requires the EWS Managed API 1.2 or later."
		    "Please download and install the current version of the EWS Managed API from"
		    "http://go.microsoft.com/fwlink/?LinkId=255472"
		    ""
		    "Exiting Script."
		    exit
		    } 
  	}
}

function Handle-SSL{
    param( 
    )  
 	Begin
	{
		## Code From http://poshcode.org/624
		## Create a compilation environment
		$Provider=New-Object Microsoft.CSharp.CSharpCodeProvider
		$Compiler=$Provider.CreateCompiler()
		$Params=New-Object System.CodeDom.Compiler.CompilerParameters
		$Params.GenerateExecutable=$False
		$Params.GenerateInMemory=$True
		$Params.IncludeDebugInformation=$False
		$Params.ReferencedAssemblies.Add("System.DLL") | Out-Null

$TASource=@'
  namespace Local.ToolkitExtensions.Net.CertificatePolicy{
    public class TrustAll : System.Net.ICertificatePolicy {
      public TrustAll() { 
      }
      public bool CheckValidationResult(System.Net.ServicePoint sp,
        System.Security.Cryptography.X509Certificates.X509Certificate cert, 
        System.Net.WebRequest req, int problem) {
        return true;
      }
    }
  }
'@ 
		$TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)
		$TAAssembly=$TAResults.CompiledAssembly

		## We now create an instance of the TrustAll and attach it to the ServicePointManager
		$TrustAll=$TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")
		[System.Net.ServicePointManager]::CertificatePolicy=$TrustAll

		## end code from http://poshcode.org/624

	}
}
function Report-OnlineMeetings
{    
    param( 
    	[Parameter(Position=0, Mandatory=$true)] [string]$MailboxName,
		[Parameter(Position=1, Mandatory=$true)] [System.Management.Automation.PSCredential]$Credentials,
		[Parameter(Position=2, Mandatory=$true)] [DateTime]$StartDate,
		[Parameter(Position=3, Mandatory=$true)] [DateTime]$EndDate,
		[Parameter(Position=4, Mandatory=$false)] [switch]$useImpersonation

    )  
 	Begin
	{
		$RptCollection = @()
		$service = Connect-Exchange -MailboxName $MailboxName -Credentials $Credentials
		if($useImpersonation.IsPresent){
			$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)
		}
		$Recurring = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::Appointment, 0x8223,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Boolean); 
		$psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)  
		$psPropset.Add($Recurring)
		$OnlineMeetingConfLink = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::PublicStrings,"OnlineMeetingConfLink",[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String); 
		$psPropset.Add($OnlineMeetingConfLink)
		# Bind to the Calendar Folder
		$folderid= new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Calendar,$MailboxName)   
		$Calendar = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)		
		$AppointmentState = @{0 = "None" ; 1 = "Meeting" ; 2 = "Received" ;4 = "Canceled" ; }
		#Define the calendar view  
		$CalendarView = New-Object Microsoft.Exchange.WebServices.Data.CalendarView($StartDate,$EndDate,1000)    
		$fiItems = $service.FindAppointments($Calendar.Id,$CalendarView)
		if($fiItems.Items.Count -gt 0){
			$type = ("System.Collections.Generic.List"+'`'+"1") -as "Type"
			$type = $type.MakeGenericType("Microsoft.Exchange.WebServices.Data.Item" -as "Type")
			$ItemColl = [Activator]::CreateInstance($type)
			foreach($Item in $fiItems.Items){
				$ItemColl.Add($Item)
			}	
			[Void]$service.LoadPropertiesForItems($ItemColl,$psPropset)
			foreach($Item in $ItemColl){
					##Check Organizer
					if($Item.Organizer.Address.ToLower() -eq $Mailboxname.ToLower()){		
						$OnlineMeetingConfLinkVal = $null
						if($Item.TryGetProperty($OnlineMeetingConfLink,[ref]$OnlineMeetingConfLinkVal)){
							$rptObj = "" | Select AppointmentSubject,Type,OccuranceStart,OccuranceEnd,Duration,Attendees
							$rptObj.OccuranceStart = $Item.Start  
							$rptObj.OccuranceEnd = $Item.End  
							$rptObj.Duration = $Item.Duration
							$rptObj.AppointmentSubject  = $Item.Subject   
							if($Item.AppointmentType -eq "Occurrence")
							{
								$rptObj.Type = "Recurrent"
							}
							else
							{
								$rptObj.Type = "Single"
							}
							$RptCollection += $rptObj
						    foreach($attendee in $Item.RequiredAttendees){
								$atn = $attendee.Address + ";"	
								$rptObj.Attendees += $atn
							}
							foreach($attendee in $Item.OptionalAttendees){
								$atn = $attendee.Address + ";" 	
								$rptObj.Attendees += $atn
							}
						}
					}
				
			
			}   
		}
		$RptCollection | Export-Csv -NoTypeInformation -Path "c:\temp\$MailboxName-CalendarCSV.csv"
	}
}