I'm having an issue with one of our end users. His manager requested that he have a "send as" permission for an inbox that we manage. We are running Exchange 2007, with end users running Windows XP, so my first method of action was to log into our Exchange Server, open Exchange Management Console and found the inbox that he needs permissions to. I right clicked on it and selected "Manage Send As Permission" and added the user to this selection. I then went down to his station and added the inbox to his Outlook. Tried to send as this user but I recieved an error stating the following...
"You do not have the permission to send the message on behalf of the specified user."
I then right clicked on the account and tried "Manage Full Access Permission" and added him to this selection as well. Went down to his station and unfortunately I'm having the same issue. Has anybody ever run into a problem like this?