Re: Incoming mail during Exchange 5.5 to 2003 migration

From: S.Y. Paul Lai (syplai_at_hotmail.com)
Date: 12/03/04 

Date: Fri, 3 Dec 2004 09:28:51 +0800

ADC won't move mailboxes.

You need to use Exchange Migration Wizard for moving
mailboxes across 2 different organizations. For public
folders, you need to use InterOrg Replication Utility.

I think you need a 2 phases migration:

First, use ADMT and Exchange Migration Wizard to
create the users and mailboxes in the new organization.
This step may span several days, as you said.

Second, modify the MX records to point to the new
organization. Then, use ExMerge to migrate the mails
received during the first migration period. Remember to
set an overlapping time to avoid missing mails. ExMerge
has an option to avoid message duplication.

For email address, you need to setup Recipient Policy at
the new Exchange Organization to match the email
domain for your users' mailboxes. 

-- 
S.Y.Paul Lai
MCDST, MCP+SB
"Newsgroups" <elljaygee@postmaster.co.uk>
news:41afb647$0$1069$db0fefd9@news.zen.co.uk
> Hello -
>
> We're about to migrate from NT4 / Exchange 5.5 win Win 2003/Exchange 2003.
> We'll create a new Exchange 2003 organisation, using ADMT and ADC to
handle
> the account and mailbox moves.
>
> Given that the Exchange migration will span several days, both old and new
> servers will host active mailboxes along the way. In that case, what's the
> best way to maintain incoming email to users on both servers? Presumably,
> the 5.5 servers will continue to accept incoming mail , because that setup
> remains intact during migration. Does the ADC know about mailboxes that
have
> been migrated and send the mail across (I didn't have that impression)? I
> ask so because if we configure the gateway to send incoming mail to both
> servers, surely the 2003 servers will generate NDRs for mailboxes they
don't
> yet host? This begs the question of address ownership - my understanding
is
> that Exchange 2003 doesn't have a user's SMTP addresses until they've been
> migrated - is that right?
>
> Does the ADC does not maintain mailflow between the servers? Also, is it
the
> case that, as far as Exchange 2003 is concerned, it does not impose SMTP
> addresses on mailboxes that correspond to the domain name of the AD -
which
> will be different from the email domain name?
>
> I'd be grateful for any relevant advice.
>
> Many thanks.
>
> Loftus.
>
>

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