OneDrive to restrict access to a document
This is a public page.
This is a link to a file on oneDrive which is set to be viewable by 'People in Nexus365 with the link' (ie pretty much all of ox.ac.uk) which means it will need a logo to access.
(It could also be set to be editable by the same users.)
Note also that it can only be shared with people outside the ox.ac.uk to specifically notified email addresses. There is no option to share a OneDrive file publicly.