Comment by p_ing

> DankStartup's O365,

If you wanted to try to re-take over a pre-registered domain in Azure/M365, you would need to involve Microsoft Support who would require you to prove via government documentation that you were the same entity for the now-abandoned Azure/M365 account.

Creating a new tenant using the same public domain won't get you access to the Azure/M365 tenant of a previous customer, you would have a different internal domain name (dankstartup2.onmicrosoft.com).

At best you could register your domain post-expiration of the previous tenant and impersonate them >90 days out.