When you use the Delegate Access feature in Outlook 2003 to grant an Outlook 2003 user or an Outlook 2002 user access to your Inbox, the delegate may receive an error message that is similar to the following when the delegate opens a message in your Inbox:
Cannot open this item. You do not have the appropriate permission to perform this operation.
This issue may occur if you assign the delegate Reviewer permission to your Inbox, and both of the following conditions are true:
The message is digitally signed.
The message uses Microsoft Outlook Rich Text Format (RTF) and contains a Transport Neutral Encapsulation Format (TNEF) body part.
To work around this issue, grant the delegate Editor permissions to your Inbox. Note that when you grant a delegate Editor permission to your Inbox, the delegate can read, create, modify, and delete items in your Inbox. To grant a delegate Editor permission to your Inbox, follow these steps:
Start Outlook (if it is not already started).
On the Tools menu, click Options, and then click the Delegates tab.
Click the delegate whose permissions you want to change, and then click Permissions.
In the Inbox box, click Editor (can read, create, and modify items).
To send a message to notify the delegate of the change in permissions, click to select the Automatically send a message to delegate summarizing these permissions check box.
Click OK, and then click OK.
The permissions that you can assign to a delegate are described as follows::
Reviewer: The delegate can read items. For example, the delegate can read items that are contained in your Inbox.
Author: The delegate can read and create items, and modify and delete items that the delegate creates. For example, the delegate can create task requests and meeting requests in a manager's Task folder or Calendar folder, and then send either item on behalf of the manager.
Editor: The delegate can perform everything that an Author can do, and the delegate can also modify and delete items that the manager creates.
Note When a delegate has either Author or Editor permission, the delegate can send mail on behalf of another user. For example, the delegate can send mail on behalf of a manager. When a recipient views the message, the delegate's name appears in the From box and the manager's name appears in the Sent on Behalf Of box of the message.
For more information about the Delegate Access feature in Outlook 2003, see Outlook 2003 Help. To do so, on the Help menu, click Microsoft Outlook Help. In the Search for box, type delegate access, and then press ENTER to view the topics returned.