A. By default, the Security tab isn't displayed on an Exchange organization's properties page. To display the tab, perform these steps:
- Start the registry editor (regedit.exe).
- Navigate to the HKEY_CURRENT_USER\Software\Microsoft\Exchange\EXAdmin subkey.
- From the Edit menu, select New and click DWORD Value.
- Enter a name of ShowSecurityPage and press Enter.
- Double-click the new value and set it to 1. Click OK.
- Close the registry editor.
The Security tab will now be displayed on the Exchange organization's properties page. At the Security tabbed page you can turn off the Send As and Receive As deny settings, which I discuss in the FAQ "How can I configure Microsoft Exchange Server 2003 administrators so that they can access all users' mailboxes?" at http://www.winnetmag.com/articles/index.cfm?articleid=42867 to grant Exchange administrators full access to all mailboxes in the organization. The Security tab method is a simpler way to grant administrators access to users' mailboxes than the technique described in the FAQ; however, it lets you grant access only to all mailboxes (or none).