Hello Pedro Cunha,
Welcome to Microsoft Q&A Forum, thank you for posting your query here!
Unfortunately, we regret to inform you that Azure Student subscriptions cannot be transferred to a different tenant. Because these subscriptions are non-transferable and are limited to one per eligible customer.
Please refer to the below official documents for better understanding.
- https://learn.microsoft.com/en-us/azure/education-hub/about-azure-for-students
- https://azure.microsoft.com/en-us/pricing/offers/ms-azr-0170p/
So, in order to avail all the free services in your own tenant, you need to have the new subscription in your own tenant.
Hope this helps!
Please reply if you there are any challenges.
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Thanks