Retrieve public folder calendar appointments with Exchange Powershell - powershell

Question

I'm trying to retrieve all appointments existing on a calendar in the organization's public folders, for reporting purposes.
Exchange 2010's Powershell cmdlet Get-PublicFolderItemStatistics does return some of the information I need, but it seems like the returned objects are missing some of the properties that should exist on the Appointment object, even though I do see their values on the appointment in Outlook (also 2010).
Specifically, I need the Start and End date properties, which are coming back blank.
An example:
Get-PublicFolderItemStatistics -identity "\30 Day" | Sort-Object CreationTime | Format-List
Returns:
ServerName : EXCHANGE1
DatabaseName : Public Folder Database 167851469
Subject : Test 30
PublicFolderName : \30 Day
LastModificationTime : 1/19/2015 3:05:05 PM
CreationTime : 1/19/2015 3:05:05 PM
HasAttachments : False
ItemType : IPM.Appointment
MessageSize : 5.47 KB (5,601 bytes)
Identity : (removed)
MapiIdentity : (removed)
OriginatingServer : exchange1.mydomain.local
IsValid : True
ObjectState : Changed
And:
Get-PublicFolderItemStatistics -identity "\30 Day" | Sort-Object CreationTime | Format-List Subject,CreationTime,Start,End
Returns:
Subject : Test 30
CreationTime : 1/19/2015 3:05:05 PM
Start :
End :
However the appointment in Outlook shows the Start and End times correctly:
Is there a way to retrieve this information from the server side? I was hoping to avoid Outlook interop if possible.

Answer 1

That cmdlet only returns a limited subset of Item properties if you want anything else you will need to use a client API like EWS or the outlook OOM to access the Public folder and the contents. To use a client API against the folder you will need to have rights to that folder then you can use something like this in EWS and Powershell
## Get the Mailbox to Access from the 1st commandline argument
$MailboxName = $args[0]
## 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
}
## Set Exchange Version
$ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2
## 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
$creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())
$service.Credentials = $creds
#Credentials Option 2
#service.UseDefaultCredentials = $true
## Choose to ignore any SSL Warning issues caused by Self Signed Certificates
## 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
## 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
$service.AutodiscoverUrl($MailboxName,{$true})
"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)
function FolderIdFromPath{
param (
$FolderPath = "$( throw 'Folder Path is a mandatory Parameter' )"
)
process{
## Find and Bind to Folder based on Path
#Define the path to search should be seperated with \
$folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::PublicFoldersRoot)
$tfTargetFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)
#Split the Search path into an array
$fldArray = $FolderPath.Split("\")
#Loop through the Split Array and do a Search for each level of folder
for ($lint = 1; $lint -lt $fldArray.Length; $lint++) {
#Perform search based on the displayname of each folder level
$fvFolderView = new-object Microsoft.Exchange.WebServices.Data.FolderView(1)
$SfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,$fldArray[$lint])
$findFolderResults = $service.FindFolders($tfTargetFolder.Id,$SfSearchFilter,$fvFolderView)
if ($findFolderResults.TotalCount -gt 0){
foreach($folder in $findFolderResults.Folders){
$tfTargetFolder = $folder
}
}
else{
"Error Folder Not Found"
return $null
}
}
if($tfTargetFolder -ne $null){
return $tfTargetFolder.Id.UniqueId.ToString()
}
}
}
#Example use
$fldId = FolderIdFromPath -FolderPath "\test\calendar"
$SubFolderId = new-object Microsoft.Exchange.WebServices.Data.FolderId($fldId)
$SubFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$SubFolderId)
if($SubFolder -ne $null){
#Define ItemView to retrive just 1000 Items
$ivItemView = New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)
$fiItems = $null
do{
$fiItems = $service.FindItems($SubFolder.Id,$ivItemView)
#[Void]$service.LoadPropertiesForItems($fiItems,$psPropset)
foreach($Item in $fiItems.Items){
$Item.Subject + " " + $Item.Start
}
$ivItemView.Offset += $fiItems.Items.Count
}while($fiItems.MoreAvailable -eq $true)
}
Cheers
Glen