Ports & IP Addresses to Allow RRS feed

  • Question

  • Hi All

    I am using exchange2010 hybrid environment and all my mailboxes are on cloud and i have hardly 10 mailboxes in exchange onprem. All my CAS servers are listening to port 80, 443 and we are seeing malicious traffic on port 80.
    So i want to block external access to port 80/443 for non office365 sources on firewall. In this case what ip addresses do i need to allow,i am not sure on this experts guide me on this
    Wednesday, February 26, 2020 2:27 PM


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