Hi @Luis Olias · Thank you for reaching out.
Unfortunately, you cannot rename Azure tenant. However, you can create a new tenant with desired name (if the name is available and not already taken by someone else) and then transfer your pay-as-you-go subscription to the new tenant.
For this purpose, you need to add your user account as guest account to the new tenant and assign Global Administrator directory role and perform below steps:
- Go to Subscriptions.
- Select a subscription.
- Select Change directory.
For step by step instructions, please refer to:
https://learn.microsoft.com/en-us/azure/active-directory/fundamentals/active-directory-how-subscriptions-associated-directory
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