Outlook Contacts Wrong after move to another exchange server

Hi Guys.

I have a problem.

We have moved from our own exchange 2003 server to a new exchange server with rackspace. But all our outlooks seems to have old contact information cached from the old server. when i send to a user that existed on the old server. it like wants to deliver it to the old server. Where does this information come from? even when i enter a email address.
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tim_carterAsked:
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MegaNuk3Commented:
You either need to clear the cache as mentioned above OR add X500 email addresses to everyone's mailboxes. The X500 address is the old legacyExchangeDN value of the mailbox. They look like /o=org/OU=admin group/CN=recipients/CN=John.doe

If you try and reply to an old message received from someone internally, it should NDR back with what the X500 address should be for that person.
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Glen KnightCommented:
You need to update the X500 address to include the old Exchange organisation, this is a known issue and there is a KB article on how to resolve it using ADModify here: http://support.microsoft.com/kb/909271
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