When you add a contact from the Contacts folder in a new message in Microsoft Outlook, right-click the contact in the 
To field, and then click 
Send Options, you may receive the following error message:
Cannot perform the requested operation. The command selected is not valid for the recipient. To set options for this message, click Options on the toolbar.
To determine the unique number that is associated with the message that you receive, press CTRL+SHIFT+I. The following number appears in the lower-right corner of this message: 
If you click the 
To button, add a contact from the Contacts folder to the 
To box, right-click the contact, and then click 
Send Options in a new message, you may receive the following error message:
Per-recipient send options could not be set. This recipient has no options specified.