This article will help to fix the below errors for MS Exchange Server 2016
I. Certificate error "name on the security certificate is invalid or does not match the name of the site"
II. Out of Office not working
III. Make Internal URLs and Externa…
In this article I will be showing you how to subnet the easiest way possible for IPv4 (Internet Protocol version 4). This article does not cover IPv6.
Keep in mind that subnetting requires lots of practice and time.