Error message when you try to modify a meeting that a delegate created in Outlook: "You cannot schedule a meeting with <resource name> because you do not have the appropriate permissions"

If a manager that permits delegate access to their calendars tries to modify a meeting that a delegate created with a direct book resource, the manager may receive the following error message In this message, resource name is the name of your resource.

If the delegate has Owner permissions to the Calendar folder, these permissions are not inherited by the resource mailboxes. When the delegate directly books an appointment to the resource mailbox on behalf of the manager, the delegate has become the owner of the appointment item, not the manager. The delegate is the owner for the items that direct book to the resource mailbox even though the appointment item displays the manager as the meeting organizer.

Use one of the following methods to work around this problem:

• Set up a delegate account that automatically responds to meeting requests that come to resource mailboxes. With this option, Microsoft Outlook remains logged on to the delegate account that handles the booking of resource mailboxes. You do not use the Outlook Direct Booking feature with this option. -
• Set the default permission on the resource Calendar folder to Editor. With this option, everyone can update all appointment items from the resource account.
• Give Editor permission to the individuals that have to update the appointment items from the resource Calendar folder. With this option, those people who have Editor permission can update all appointment items from the resource account.

The resource mailbox requires Editor permissions for the delegate or manager that tries to modify the appointment items from the resource mailbox.