How do you register a grade outside campus?
Course coordinators and examiners are able to enter grades themselves in OSIRIS-Lecturer (see also: Who can enter grades and in which Osiris variant?).
For safety reasons, a 2-factor-authentication is needed. This is needed because the OSIRIS website is openly available on the internet, unlike OSIRIS-Basis, which is only available via the WUR network, or when connected to WUR-VPN.
Results outside campus can be entered on your own computer or using a WUR laptop. Go to https://osiris.wur.nl/osiris_docent and log in. When signing the results, again your password will be asked (the 2-factor-authentication).
See also: How to enter results for individual students.