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bahaa habhab

How Can I use 2 Public IP on Exchange Server

how can I use 2 public ip from deferent company  on exchange server with one domain like when the first one stop the second one will work automatically ? 

asked02/02/2023 09:11
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Last Activity 02/02/2023 09:46

1 Answer(s)

  • Mariette Knap

    You need a Firewall device that can handle multiple IP addresses and do fail over. You also need to create multiple DNS records in public DNS like:

    • Host A record mail1.domain.com = pub IP address one
    • Host A record mail2.domain.com = pub IP address two
    • MX Record like
      • MX domain.com mail1.domain.com pref 0
      • MX domain.com mail2.domain.com pref 10
    • Probably you also need to do something like this for autodiscover records.

    It is basically a routing issue and not an Exchange Server issue
    answered 02/02/2023 09:46
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