Outlook 2010 can’t book meeting room as resources on Exchange 2003

First of all, in Exchange 2003, there are not real “Resources” objects. Meeting rooms are like normal users. So Microsoft implemented “Direct Book“, which is implemented on Outlook client side.

in Outlook 2010, this Direct Book option is not enabled by default. If you add a room to resources and send the invite, an invite email is sent to this room user inbox. If nobody monitors this email account, your room will not be booked and the calendar of this room will not be marked as busy. You will realize this when you see other people in the meeting room at your meeting time you are trying to book.

The fix:

Easy done by a registry update.

  1. Exit Outlook.
  2. Start Registry Editor.
  3. Locate and then select the following subkey in the registry:
  4. HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Options\Calendar
  5. On the Edit menu, point to New, and then click DWORD Value.
  6. Type EnableDirectBooking, and then press ENTER.
  7. Right-click EnableDirectBooking, and then click Modify.
  8. In the Value data box, type 1, and then click OK.
  9. Exit Registry Editor.
  10. Start Outlook.



More information can be seen at http://support.microsoft.com/kb/982774



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