Converting from Exchange 2003 to Exchange 2007

I have a client who is running Exchange 2003 on SBS 2003 and I need to convert their email to Exchange 2007 since some of the user want to connect Macs.

The new version of Office for the Mac requires Exchange 2007 or better.

I am planning on adding a new server ESever running Windows 2003 64 bit to host Exchange 2007.  

I would like to know if in the process is there a change in the AD domain which I need to do in advance ? Is there a difference in the AD domain changes between going to SBS 2008 or W2003 64 with Exchange 2007 ?

Should I just bite the bullet and upgrade my sbs 2003 to 2008/11 ?

Once I have the new server up I was planning on doing a move mailbox. Will this work or should I use a backup to restore to the new location ?

Is there a automated way to modify the current uses email servers in outlook to point to the new system ?

Thank you
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HalCHubAsked:
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Miguel Angel Perez MuñozCommented:
This requirements of 2007 version is per use Outlook features, but maybe using email as imap client, you don´t need migrate.
HalCHubAuthor Commented:
Whould Imap give them active sync like functionality ?
AkhaterCommented:
rolfesmaCommented:
If you have limited experience with Exchange migrations and don’t want to worry about running schema update commands, setting up a mail connector between the current and new Exchange servers then an SBS03 to SBS08 upgrade is the way to go. Several years ago I performed one of these with minimal knowledge of Exchange and the wizard-ized upgrade went well. No issues to report. Now after completing many Exchange 2003 to Exchange 2007/2010 upgrades and being called in to clean up upgrades with issues I would recommend the SBS to SBS upgrade path. Besides the schema updates Exchange objects also require updating via script to be compatible with versions of Exchange newer than 2003. The SBS to SBS approach walks you through everything with a wizard. There’s also now replacement for studying up before you do any upgrade.
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