I'm sorry, I can't reproduce that at all.
I tested with Outlook 2007 SP2 and any reply from a shared mailbox using the
From as the shared mailbox alias always provided SentOnBehalfOfName and the
equivalent MAPI property in the items going to Sent Items in the default
mailbox.
Original emails using that From also had that property on them.
--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm
"rpratikno" wrote in message
news

Hi Ken,
Thanks for the tips to start debugging =) I manage to found the cause.
After installing Outlook SP2, if we reply any group email on group
mailbox,
the email From field will no longer contain SendOnBehalf properties, which
definitely break the macro.
Do you have any suggestion to fix it?
Thanks.