See this example properly formatted in the QUT Cite tool.
If the audience you are writing for can retrieve the work you are using, reference it as you would normally. If the reader cannot access the document, cite it as a personal communication. If the intranet requires you to login, use the homepage URL of the intranet for the source element of the reference.
Author, A. A. (Year). Title [Description if useful]. https://www.xxxxxxxx.xxx
QUT Library. (n.d.). Organising your notes [Tipsheet]. https://qutvirtual4.qut.edu.au/
The HiQ page requires a login so use the homepage URL, not the URL of the document itself.
For more information see the APA Blog.