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outlook anywhere do use 443 only <br />
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If you are sure that users with exchange 2007 don't need to access mailboxes with OWA until migration, you can ignore this step<br />
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Note that if user count is more for migration, you should use legacy name space to avoid inconvenience
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outlook anywhere do use 443 only

If you are sure that users with exchange 2007 don't need to access mailboxes with OWA until migration, you can ignore this step

Note that if user count is more for migration, you should use legacy name space to avoid inconvenience

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When I switch in the Firewall for the existing External IP address that currently goes to the Exch2007 to the Exch2013, will Outlook anywhere use the Ech2013 port 443 and pass through internally to the Exch2007 or will it send legacy.domain.com back to the client and client resolves the IP and goes back to the external IP for the EXCH2007, port 443?
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When I switch in the Firewall for the existing External IP address that currently goes to the Exch2007 to the Exch2013, will Outlook anywhere use the Ech2013 port 443 and pass through internally to the Exch2007 or will it send legacy.domain.com back to the client and client resolves the IP and goes back to the external IP for the EXCH2007, port 443?

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My Question is, do I need port 443 for legacy.Domain.com to point to the exchange 2007 server if the users do not use OWA, during the migration of 2007 to 2013 Exchange?<br />
&nbsp;Offsite users are configured for Outlook anywhere, and I am not sure if that uses port 443.
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My Question is, do I need port 443 for legacy.Domain.com to point to the exchange 2007 server if the users do not use OWA, during the migration of 2007 to 2013 Exchange?
 Offsite users are configured for Outlook anywhere, and I am not sure if that uses port 443.

2007-2013 Migration DNS Records

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.