Miscellaneous topics that do not fit into specific categories.
Hello @Stephan Schilcher,
As this issue is related to Volume Licensing and you have administrator rights when accessing the tenant, I recommend contacting the Volume Licensing Support Team directly for immediate assistance. They have the specialized tools and visibility required to review your account and help restore access to the Volume Licensing Service Center (VLSC), if necessary.
You can reach them using the following link: Contact volume licensing support | Microsoft Learn
Please feel free to let me know if you have any further questions. I’m here to help.