Yesterday I received a call from a user who was unable to do the following,  ”Use the Mark Complete flag” in Outlook or “Copy message from their inbox to a share public folder”. After researching the issue I came across this article from Microsoft that solved the issue. 


Solution:


To resolve this issue, remove the explicit Deny for the Everyone group on these permissions:

  1. Start Exchange System Manager.
  2. Under the Folders object, right-click the Public Folders object, and then click Properties.

 Fig1

3. Click the Security tab, and then click the Everyone group.

4. Click to de-select the Deny check box for the three following permissions:

     * Create public folder
     * Create top level public folder
     * Create named properties in the information store