Let's say that you have an external domain that your company regurlarly works with. You want to customize some items for this external domain such as you want them to get out of office replys and you want the domain to not have a MailTip message that it is an external user.
New-RemoteDomain -DomainName externaldomain.tld -Name externaldomain
set-remotedomain externaldomain -IsInternal $true -AutoReplyEnabled $true -AutoForwardEnabled $true
No more MailTips for this set.
Get the details by:
get-remotedomain externaldomain |fl