Can I also use the AOS portal with OSS portal access data?
No, it is not possible to log on to the AOS portal using OSS portal access data. The AOS portal is the successor to the OSS portal. The AOS portal contains a significantly expanded range of functions as well as the well-known OSS portal contents. If you had an OSS portal already, you have been informed about the changeover by now. After logging on to the OSS portal you will find your new access data for the AOS portal.