troubleshooting Question

Transitioning Exchange 2003 to 2010

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Montana ManFlag for United States of America asked on
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I have a MS Exchange 2003 server and need to upgrade it to 2010.  I have one domain in this example called  When users are on the outside they type in: which points to a  public ip(this example: and from the inside I just point there Outlook account to the server(company-exc-001), and way we go.  Also I am not using a ISA server.  In my reading a lot of users transition from 2003 to 2010 basically coexisting and then remove after awhile.  Could anyone give me "exact" steps to follow?  I know that is asking a lot but pointing in the correct direction would be great.  And any other helpful information to look out for or read would be great.  Thanks!
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