title: Extract Exchange 2007 Public Calendar Appointments using Exchange Web Services API
body: <p>We have a public calendar for our company set up in an Exchange 2007 Public Folder.  I am able to retrieve my personal calendar appointments for the current day using the code below.  I have searched high and low online and I cannot find one example of someone retrieving calendar information from a Public Folder calendar.</p>
  
  <p>It seems like it should be doable, but I cannot for the life of me get it working.  How can I modify the code below to access the calendar?  I am not interested in creating any appointments through asp.net, just retrieving a simple list.  I am open to any other suggestions as well.  Thanks.</p>
  
  <p><strong>ADDED BOUNTY</strong><br>
  - I can't be the only person that ever needed to do this.  Let's get this problem solved for future generations.</p>
  
  <p><strong>UPDATED AGAIN DUE TO IGNORANCE</strong><br>
  - I failed to mention that the project I am working on is .NET 2.0 (very important don't you think?).</p>
  
  <p><strong>* ADDED MY CODE SOLUTION BELOW *</strong><br>
  - I have replaced my original code example with the code that ended up working.  Many thanks to Oleg for providing the code to find the public folder, which was the hardest part..  I have modified the code using the example from here <a href="http://msexchangeteam.com/archive/2009/04/21/451126.aspx" rel="noreferrer">http://msexchangeteam.com/archive/2009/04/21/451126.aspx</a> to use the simpler FindAppointments method.</p>
  
  <p>This simple example returns an html string with the appointments, but you can use it as a base to customize as needed.  You can see our back and forth under his answer below.</p>
  
  <pre><code>using System;
  using Microsoft.Exchange.WebServices.Data;
  using System.Net;
  
  namespace ExchangePublicFolders
  {
      public class Program
      {
          public static FolderId FindPublicFolder(ExchangeService myService, FolderId baseFolderId,
          string folderName)
          {
  
          FolderView folderView = new FolderView(10, 0);
          folderView.OffsetBasePoint = OffsetBasePoint.Beginning;
          folderView.PropertySet = new PropertySet(FolderSchema.DisplayName, FolderSchema.Id);
  
          FindFoldersResults folderResults;
          do
          {
              folderResults = myService.FindFolders(baseFolderId, folderView);
  
              foreach (Folder folder in folderResults)
                  if (String.Compare(folder.DisplayName, folderName, StringComparison.OrdinalIgnoreCase) == 0)
                      return folder.Id;
  
              if (folderResults.NextPageOffset.HasValue)
                  folderView.Offset = folderResults.NextPageOffset.Value;
          }
          while (folderResults.MoreAvailable);
  
          return null;
      }
  
      public static string MyTest()
      {
          ExchangeService myService = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
  
          myService.Credentials = new NetworkCredential("USERNAME", "PASSWORD", "DOMAIN");
          myService.Url = new Uri("https://MAILSERVER/ews/exchange.asmx");
  
          Folder myPublicFoldersRoot = Folder.Bind(myService, WellKnownFolderName.PublicFoldersRoot);
          string myPublicFolderPath = @"PUBLIC_FOLDER_CALENDAR_NAME";
          string[] folderPath = myPublicFolderPath.Split('\\');
          FolderId fId = myPublicFoldersRoot.Id;
          foreach (string subFolderName in folderPath)
          {
              fId = Program.FindPublicFolder(myService, fId, subFolderName);
              if (fId == null)
              {
                  return string.Format("ERROR: Can't find public folder {0}", myPublicFolderPath);
  
              }
          }
  
          Folder folderFound = Folder.Bind(myService, fId);
          if (String.Compare(folderFound.FolderClass, "IPF.Appointment", StringComparison.Ordinal) != 0)
          {
              return string.Format("ERROR: Public folder {0} is not a Calendar", myPublicFolderPath);
  
          }
  
          CalendarFolder AK_Calendar = CalendarFolder.Bind(myService, fId, BasePropertySet.FirstClassProperties);
  
          FindItemsResults&lt;Appointment&gt; AK_appointments = AK_Calendar.FindAppointments(new CalendarView(DateTime.Now,DateTime.Now.AddDays(1)));
  
  
          string rString = string.Empty;
  
  
          foreach (Appointment AK_appoint in AK_appointments)
          {
  
              rString += string.Format("Subject: {0}&lt;br /&gt;Date: {1}&lt;br /&gt;&lt;br /&gt;",  AK_appoint.Subject, AK_appoint.Start);    
          }
  
          return rString;
      }
  
      }
  }
  </code></pre>