I have a root site collection at https://a.site.com
Underneath this root site collection I have another site collection (host named) at https://a.site.com/sub
My users are interested in the site at https://a.site.com/sub and they have access to it. They do not have access to the root site collection at https://a.site.com.
The URL I want to tell them to use is https://a.site.com
Is it possible to set up a redirect so when they put https://a.site.com into their browsers they are taken to https://a.site.com/sub?
I have tried to use HTTP Redirect in IIS but have not been able to make it work correctly. The browser will throw "too many redirect" errors or the web server will show an error about the directory not existing.