To perform the exchange, a computer with the installed server package should always be accessible from the Internet. Thus, it should have a static IP-address. But very often getting it can be quite costly. To solve this problem, you can use the service of assigning a permanent domain name to a dynamic IP-address.
This service is provided for free, for example, by the company «FreeDNS». All necessary information can be found on their website.
In this case you will need to indicate your registered domain name on the terminal in the exchange application, the «Address» field of Remote exchange.
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