If you are using OneDrive for work stuff you might be using the OneDrive for bussiness (which I think you get with 365 account) that is completely different from the personal OneDrive. The bussiness version is using the sharepoint format for the sharing. If I remember correctly there was a thread in here somwhere with some instructions to get sharepoint or some other WebDAV service to work on N900. I remember testing it, but didn't have the time/skill/patience to get it working. Try searching with sharepoint or WebDAV keywords if it is really OneDrive for Bussiness that you are using.