Processus dans Microsoft 365 pour configurer des applications Office, entrer des clés de produit et activer des licences.
Hello Marion ZANGER,
Good day and welcome to the community! We are happy to help you.
May I know what kind of administrator problem do you have? The administrator sign in issue?
If you have the sign in issue and you only have one global administrator, then you need to involve Microsoft data protection team. Please try to find the related hotline number to call the frontline let the agent raise a ticket for you : Numéros de téléphone du service clientèle - Support Microsoft
And when the Microsoft data protection team get this case, they will then be able to help you with your concerns.
If you still cannot reach an agent through the link above, there is still a workaround, you can create a new business account with free trial to allow yourself raise a support ticket, there you could provide your current account details. Ask the agent to escalate this issue for a temporary login.
As forum moderators, we don’t have access to the backend systems to troubleshoot this effectively due to privacy and security constraints. For that reason, the most efficient solution would be to contact Microsoft’s support team directly
Thank you very much for your valuable time and your cooperation.
Best Regards,
Mia - MSFT | Microsoft Community Support Specialist.