Hi Dako Chan,
Thanks for reaching out to Microsoft Q&A.
The $200 free credit can be utilized on any Azure services for 30 days post that if you want to continue you will have to convert your plan into a pay-as-you-go model or you won't be able to utilize any of them. The 12 months free is only for those Azure services that are free to use, not for all the services that are available or that you have created using the free $ credit.
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