I have a user that is setup as a Owner/Delegate of a multi user Calendar. In
active directory under this account her name shows up under Send on Behalf
and when she cancels a meeting it lets her cancel the meeting, but when she
clicks the send cancellation button she gets back emails for each user that
says:
"You do not have permission to send to this recipient. For assistance,
contact your system administrator.
MSEXCH:MSExchangeIS:/DC=us/DC=or/DC=redmond/DC=ci:"server""

These are people that she send's emails to all the time.

Note: The meetings she is trying to cancel were create by a employee that is
no longer here and does not have a network account but her name show up in
the meeting.

Does anyone have any ideas on this.
Thanks,
Joe