title: PR_ATTR_HIDDEN property is missing when a new folder is created in outlook 2013
body: <p>I am developing an Outlook 2013 addin using c#. As part of the requirement I need to enumerate all the visible folders. Following is the sample code that I am using.</p>
  
  <pre><code>public List&lt;Outlook.Folder&gt; EnumerateFolders(Outlook.Folder parentFolder)
  {
      List&lt;Outlook.Folder&gt; allFolders = new List&lt;Outlook.Folder&gt;();
      EnumerateFolders(parentFolder, allFolders);
      return allFolders;
  }
  
  public void EnumerateFolders(Outlook.Folder parentFolder, List&lt;Outlook.Folder&gt; allFolders)
  {
      Outlook.Folders childFolders = parentFolder.Folders;
      if (childFolders.Count &gt; 0)
      {
          foreach (Outlook.Folder childFolder in childFolders)
          {
              try
              {
                  bool isHidden = childFolder.PropertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/proptag/0x10F4000B");
                  if (!isHidden)
                  {
                      allFolders.Add(childFolder);
                  }
              }
              catch (Exception ex)
              {
                  System.Diagnostics.Debug.WriteLine(ex.Message);
              }
  
              // Call EnumerateFolders using childFolder.
              EnumerateFolders(childFolder, allFolders);
          }
      }
  }
  </code></pre>
  
  <p>The problem I am facing here is, if I create a new folder under root folder and execute the above code I am getting an error "MAPI property 0x10F4000B is not found". 0x10F4000B is for PT_ATTR_HIDDEN.</p>
  
  <p>If I create new folder using OWA, then this property is available. It is not available only when I create the folder in Outlook 2013.</p>
  
  <p>Can somebody please help me in understanding what is the problem here.
  Thanks in advance.</p>