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Exchange Server Communication Ports

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5 replies

by dgbaum

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We currently have two Exchange Servers hooked together through a Dedicated T1 using the site connector X400. We are in the process of doing some testing on hooking them up through the internet, which the communication has to go through a firewall.What are the ports that need to be opened, and is there any other special setup to get the machines to communicate.

5 replies

by rlevesque

I would check out Microsoft Knowledge Base articles Q148732 and Q155831. Both explain what ports are needed to be mapped statically and how to do them.

by dgbaum

I followed the steps adding registry entries in MSExchangeMTA, MSExchangeDS,
MSExchangeIS, and MSExchangeSA. When we restarted the server we were not able to send and receive email between the two sites.

by dgbaum

Does the MTA report the IP address of the Exchange server to other connecting Exchange servers?

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