New answers tagged dns
Try changing the app prefix to "app" rather than "add-in". Set-SPAppSiteSubscriptionName -Name "app" Or change the host entry so it uses "add-in". The names in the URLs don't match your settings.
SharePoint doesn't care if the URLs for web applications have a DNS/HOST entry except if, you specify that it should access that URL in crawling or ... But a URL without a DNS/HOST entry somewhere doesn't give you anything as you won't be able to use it for anything. When you request a URL in the browser (or a program) then the network stack needs to ...
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