Got NDR when trying send invitation appointment to a specific distribution group from Outlook 2003 Calendar.
The NDR referred to a employee who has left the company since 2 years and the user account including mail-box are deleted.
I re-checked both AD and Exchange 2003 servers.
There is no recipient showed with the name.
And, if I create and send a regular test message to the distribution group. There is no NDR.
Problem is ONLY happenned when sending the invitation from calendar.
I deleted entire the specific distribution group and recreated a the distrubtion group
but the problem is still persist.
Next step, I will try to a test by sending invitation to each member of the group.
S.O.S Please, send me your excellent ideas
how to resolve the problem