@Andreas Nikolaou Thanks for posting in our Q&A.
For this issue, it is not related to windows 365. It is related to Microsoft 365 admin center itself. It is suggested to refer to the following article to get more accurate help.
https://video2.skills-academy.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide
Thanks for your understanding and hope everything goes well with you.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.