Hi Nils! I am very sorry but I am afraid this question is way too domain specific to be answered here. My advise is to contact CAMPUSonline Support directly with this question or ask CAMPUSonline responsible person at your university to delegate the question. Sorry for that bad news. cheers Luke
Do you mean the contact listed here: https://www.campusonline.tugraz.at/en/services/support ?
Yes, your ZID (Central IT Services) at your University should have an account for that service portal, where such requests are handled. You can also try to contact support directly but I thing this might take longer.