FULL ERROR MESSAGE: The message could not be delivered because the
recipient's destination email system is unknown or invalid. Please check the
address and try again, or contact your system administrator to verify
connectivity to the email system of the recipient.

CIRCUMSTANCES: This error msg is returned to the sender when he attempts to
set an appointment into someone else's calendar, and that someone has
delegates access set on his Calendar folder.The error msg refers to the name
of the DELEGATE, not the name of the person to whom the invitation was sent.

Even when delegates are removed from the folder and an invitation is sent,
the error message is still returned, so I guess it's NOT a delegates
issue...but I can't think what other link there can be...

Anyone ...???

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Pat Staunton