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we used to have Exchange on the SBS 2003 server inside our AD environment. Earlier this year we moved to outside Exchange provider but for the time being our local Exchange was still up&running and forwarding email to the new email accounts.

Now the time has come to turn it off and I'm not quite sure what that means for SBS environment and how to proceed.

Specifically, there is a local e-mail account associated with every user in the domain. Can I simply change the e-mail address of every user to their outside address, or should I first delete the Exchange account for every user + their Mailbox, and only then update the e-mail address?

What do you suggest? How do I proceed? TNX!

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Your best bet is to delete all of the user mailboxes on the SBS server (after you've backed up or exported the email from them) and then remove Exchange from the SBS component in Add Remove Programs.

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Is there an automated way to do that or do I have to manually do it (backup&delete mailboxes) for every user separately? And what about e-mail info in the user profile? How does Win2003 domain and AD play with an outside email references in user profile? –  imagodei Nov 4 '10 at 10:50
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It's largely a manual process. You can use Exmerge to export the contents all of the mailboxes to pst files from the server if the mailboxes are under 2GB in size. In ADUC you can select all of the user accounts, right click, select Exchange tasks, and select Delete mailbox. You'll need to reconfigure every Outlook profile to connect to the external email provider. W2K3 and AD don't care where the mailbox is. –  joeqwerty Nov 4 '10 at 10:59
    
Thank you. I've already reconfigured Outlook profiles, so this should work. If I understand correctly, after I delete mailboxes the only thing left is to enter new email address into user profiles in AD and I'm done? The Exchange General and Exchange Advanced tabs will be gone? –  imagodei Nov 4 '10 at 11:29
    
You won't need to enter any email addresses in AD for the users. There's no link between an AD user and an email address if Exchange isn't installed. You can add the email address if you like, but it has no bearing on the operation of AD. Also, don't confuse the email address with the UPN. A UPN is required and is normally set to the username@domain.local format, where domain.local is your AD DNS suffix. Once the mailboxes are deleted there won't be any Exchange related tabs on the user account properties. –  joeqwerty Nov 4 '10 at 11:34
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True enough about using another email server. That may be the best option. I've used hMailServer on Windows with good success. hmailserver.com. –  joeqwerty Nov 10 '10 at 15:05

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