Hi Nelson, Greetings! Welcome to Microsoft Q&A forum. Thank you for posting this question here.You're right; cancelling the subscription key should have revoked access to the API. However, since that isn't the case for you, could you verify that
- API is configured to require a subscription?
- The API isn't a part of any open product (Products that don't have 'Require subscription' setting turned on.
If it's not configured this way, it can be accessed without any subscription key, or with a key that doesn't belong to any product, including cancelled or deleted subscription keys; but it can't be accessed with a subscription key that belongs to a product not associated with the API.