Hello,
Environment : Exchange 2010. Version Version 14.2 (Build 247.5)
Issue :- When a user send an email form a functional / shared mailbox, the following ndr is observed
Your message could not be delivered to the following recipients or groups:
User Name
You can not send message on behalf of this user unless you have permission to do so.
Make sure you send the message on behalf of the correct sender, or ask the sender you want to authorize.
If the problem persists, contact your helpdesk.
Diagnostic information for administrators:
Source Server:
/ O = PEOPLE-NET/OU = Exchange Administrative Group (FYDIBOHF23SPDLT) / CN = Recipients / CN = user
# MSEXCH: MSExchangeIS :/ DC = org / DC = people-net/DC = int: server [] # EX #
The issue is not observed in OWA. The send as permissions are verified.
New profile is configured and autocomplete cache entry is emptied. Issue is resolved but is observed again on after couple of days.
Ref :
http://teusje.wordpress.com/2012/12/26/fixing-exchange-server-2010-error-5780x000004dc0x0000001d/
http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/417069b3-aa21-402b-83f6-1098a3e65898/
http://moodjbow.wordpress.com/2011/12/16/send-as-options-and-proxy-addresses-in-exchange-yet-another-blog/
Regards, Ajit