title: Exchange 2010 hidden folder still visible for users
body: <p>I have setup an Exchange search folder in users mailboxes under the 'Top of Information Store', and set the PR_ATTR_HIDDEN tag to TRUE.</p>
  
  <p>This works for most of my Exchange 2010 environments. But, for some reason, on some servers (different environments) these folders will remain visible in Outlook for many users (not all). </p>
  
  <p>Question here: what causes the hidden folders to be visible, even with the PR_ATTR_HIDDEN tag set to true.</p>
  
  <p>Please advice :)</p>
  
  <p>Thank you,
  Daniel</p>