Crypto mining with Azure is restricted on certain subscriptions types, including the Azure Free Account and the Azure for Students account.
Please check Azure Legal Information here in this link - https://azure.microsoft.com/en-us/support/legal/
However, on Pay-as-you-go subscription type it does not currently have any terms that prohibit cryptocurrency mining.
Below are few posts which has more details on this topic.
https://learn.microsoft.com/en-us/answers/questions/558011/minning-cryptocurrency.html
Hope that helps.
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