Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi @Amine Bensouda
I understand your situation now; you are no longer have access to the admin account of your domain. With this issue, you will need to contact support direcly:
Option 1: Please visit the following page and reach out to phone number via: Customer service phone numbers - Microsoft Support
You will need to get past the initial AI system to reach the live support team. You can refer to the guide below for tips on how to get through more easily:
Option 2: Please follow this link to create a trial tenant: https://www.microsoft.com/en-us/microsoft-365/business/microsoft-365-business-basic?msockid=3eb6980b5c6860e63a588d0c5d1761d6 - after that you will be able to access to Microsoft 365 Admin Center to raise the ticket
Assuming that you have already created an account after registering a free trial and you can go to Microsoft 365 admin center and click "Help & support" icon to raise your ticket. The agent will be able to create a ticket for you under the affected tenant and then transfer this ticket to Data Protection team who could help you to regain access.
Please mention that you are raising ticket on behalf of the affected tenant that you do not have access to. The support team will help you to create ticket on the affected tenant then later on the Microsoft Data Protection team will assist you.
Note: This process will take more time than usual (7-14 working days) for your account to get access again as Data Protection is always overwhelmed with the number of tickets. As I am forum moderator, I do not have access to Microsoft internal system to assist or push this process to be quicker.
Please note that this trial is available in 30 days. Before the expiration date, please go to Microsoft 365 Admin Center and proceed to cancel the trial to prevent further charges as this trial tenant is used for ticket creation. Instruction: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn