creating a rule in Outlook or exchange for non ad person

Struggling here.
Our domain name was 'longername' and we purchased a 'shortername'
We had a member of staff who has left. I have removed her from the domain.
Now we have new finance groups set up, but because the old user still had some people who had not changed their contact details they still send mail to oldun@longername
So, the problem.
I have added oldun@longername as an email address to newun@shortname's exchange account.
What newun@shortname wants to do is when she receives an email sent to oldun@longername, she wants a reply sent to the sender saying this is an old address, here's the new one.
Now, because oldun@longername is not part of the domain and just an address attached to a user, I cannot create a rule, even if I add her as a contact in AD.
Any ideas how an smtp address attached to someone's account can have email replied to?
It doesn't have to be attached, but what else can I do?
I tried the quick and dirty methond, just deleting it, bit Finance aren't happy as some email to that address are auto generated, so a bounce back might not be picked up.
Please help
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Why don't you (re-)create a new account with her old email address and configure an auto-reply through out of office?
jasonbourneciaAuthor Commented:
That did cross my mind, but it seems a bit overkill adding a domain user just for that.
But, if no other suggestions, I might have to go with that.
Appreciate it though.
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You can actually disable the AD account after configuring out of office. Will work though.
jasonbourneciaAuthor Commented:
The only downside is, that the message sent out says 'Out of Office'. I cannot find a way if creating a rule that works even if Outlook has not been opened.
One would have thought it must be possible to have an account on the server which could respond to the sender with a message.
Bearing in mind we still need the forward to, to the new user.
Personally, I don't think we need the forward to, but as some of these childcare vouchers are generated automatically, we might never get them correctly.
jasonbourneciaAuthor Commented:
Thanks The_Kirschi, it is not working.
You won't believe how many varitaions I have put in.
I can only think that, even though I have set the old email address for the added old user as the the original, because we use a shorter or different doamin name, something in Exchange doesn't like it.
I'll have to stick with the Out of Office and hope all recipients read the message!
Thanks again
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