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New Edge Transport Server for Exchange 2010

Posted on 2011-02-15
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I have Exchange 2010 installed with a CAS/Hub Transport Server in the primary site as well as a CAS/Hub Transport in the DR site. Currently we have Exchange 2003 co-existing in the same Domain. POSTINI points to the 2003 front end so all inbound mail is forwarded from Exchange 2003 to 2010. Also, I have an Edge Transport (not configured) installed in the perimeter network of both sites.
My question is this: When I create the edge subscription xml file and import it into the CAS/Hub Transport Server will this cause any disruption in the Exchange 2003/2010 environments?
     If all the appropriate ports are not open or communication between the Edge and Hub Transport Server is not working or my configuration is incorrect will I be able to correct these problems without out impacting the current environment? This is my first Exchange install so any information is greatly appreciated.
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Question by:mattconroy
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kgreeneit earned 2000 total points
ID: 34897665
Hi there, once your NAT and Firewall rules are pointing to the Exchange 2003 Front End server for mail delivery, then all mail will come into this server first.

If you copy the Edge Subscription XML file into the CAS/HUB transport servers this wont cause any issues with sending mails outbound until you specify within your SMTP Send Connector that the Edge Server is a smart host.

When you are ready to move into the Exchange 2010 environment for sending and recieving mails, you just then need to configure your NAT and Firewall rules to deliver mails into the Edge Server instead of the Exchange 2003 FE, and configure the internal Send Connectors to send mail through the Edge Servers with the Edge Subscritions configured.

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by:mattconroy
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Thank you. The information that you provided is essential to minimizing downtime.
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