I have two user in our compagny when they try to send an Invitation from Outlook all works OK, but the recipient receive a confirmation to accept and reply, the problem is : the reply message In question goes to an Invalid recipients and the sender in question. But the replier receive a message : Impossible to contact the following recipient : .... The Invalid recipients is an old employes and I cannot find any traces in Active Directory or Exchange Server, I tried to verify every group and Forward for those users and I found nothing.
This is my running config :
Windows 2003 SP1 and All lastest Updates
Exchange Server 2003 SP2
Windows XP SP2 and All lastest Updates
Outlook 2003 Updated