Hi, Commitment tiers are 31 days commitment: From pricing page: "Commitment Tiers allow you to reserve a fixed amount of daily data ingestion capacity for Azure Monitor and Azure Sentinel for a fixed, predictable daily fee. You can upgrade your requested tier level at any time. However, the minimum commitment period before you can opt out or reduce your capacity reservation is 31 days." "Reducing your selected capacity reservation: you can reduce your tier level or opt out entirely from the Commitment Tier pricing after the first 31 days. This 31-day clock resets every time you make any change (increase or decrease) to your selected tier level. Your new pricing tier choice will be effective at 12:01 AM UST on the following day."
This means you will have to take that charge for the next 31 days. There is no option to revert the cost.
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