@naka As per the limited access FAQ MS is currently not accepting requests to become managed customer.
What is a managed customer? What if I don't know whether I'm a managed customer? Managed customers work with Microsoft account teams. We invite you to submit a registration form for the features you'd like to use, and we'll verify your eligibility for access. We are not able to accept requests to become a managed customer at this time.
Due to the demand of the Azure OpenAI Service there are restrictions currently on accessing the same. You can always reapply to check of they are able to accept more users as managed customers and you can also enroll in the partner program to access other MS products.
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