I have just moved all the data from our in-house Exchange server to a hosted Exchange. All the users are still connected to the in-house Exchange server (because it's the AD and file server). I've cleared their Outlook saved cache and modified their NK2 files so that in-house email doesn't go to the old server. But, it doesn't matter. When I send email to accounts that were formerly in-house, they still try to go there. When I send an email from an outside source (ie gmail), it goes through fine to the account. And, they're able to receive from others outside the network. Any ideas, please?