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Change DNS info at Exchange Server

My small business recently moved from Exchange to Yahoo for email. I interested in allowing users to still access the old Exchange emails through Outlook Web Access and allowing them to forward any emails they wish to the new Yahoo account. They can access Exchange fine through OWA but when they forward an email it is processed and shows up at OWA instead of at Yahoo. What do I need to change at the server so Exchange can still process outgoing email but would sends them to the new Yahoo accounts?
The domain name has not changed.
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Michael Vasilevsky
Asked:
Michael Vasilevsky
1 Solution
 
susanzeiglerCommented:
Exchange still sees itself as responsible for the domain and therefore is delivering it just as it was configured to do. In a nutshell, an MTA will not check DNS if the recipient domain is one that they are locally authoritative for.

If you are no longer going to use exchange for receiving any mail, one solution would be to add a new domain (or use an existing one other than the external domain) to the box and make that the default. You might then be able to get by with removing the old email addresses from each user (the SMTP one with the external domain) and unchecking the box in the recipient policy stating that the server is responsible for all emails within that domain.

If the yahoo mailboxes have multiple aliases (i.e. there is an @yahoo.com address associated with each one as well) then that would be the simplest solution--the users would just need to forward the emails to the yahoo address instead of their real address.
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Michael VasilevskySolutions ArchitectAuthor Commented:
The Yahoo alias is an acceptable work-around
Thanks!!
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