A Microsoft file hosting and synchronization service.
Unfortunately, AFAIK, there is no reliable way to force a OneDrive PDF link to open on a specific page. When you share a file from OneDrive, the link goes to the online viewer, and Microsoft’s viewer ignores page parameters such as page=5 or ?page=5 that work in some local PDF readers.
A workaround would involve downloading the file and opening it in a PDF application that supports page parameters or publishing the PDF on a web server or hosting platform where the viewer respects #page=number at the end of the URL.
If you stay with OneDrive’s built-in sharing, the link will always open to page one.
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hth
Marcin