
Thank you for posting your question in the Microsoft Q&A forum.
I completely understand that accidentally deleting your Microsoft 365 Admin account is a very serious situation. Losing access to your admin center means you're currently unable to manage your tenant or delete your domain tenancy through normal channels. Based on my research, here are a few suggestions that might help resolve the issue:
Step 1: Try Restoring the Deleted Admin Account
If it’s been less than 30 days since the admin account was deleted, it may still be in a soft-deleted state and can be restored. Ask another Global Administrator to:
- Go to the Microsoft 365 Admin Center > navigate to Users > Deleted users
- Select the deleted admin account > click Restore user.
- Assign a license and reset the password to regain access.
If you're the only Global Administrator or the account is permanently deleted, you’ll need to contact Microsoft Support directly via phone service number:
The agent can create a ticket under your tenant and escalate it to the Data Protection team for further help.
Step 2: Remove Domain:
- Please refer to Remove a domain - Microsoft 365 admin | Microsoft Learn for detailed steps.
As a forum moderator, due to privacy and security constraints, I don’t have access to the detailed systems needed to help you get access to your account or tenant, but I'm here to help however I can.
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