Hello Eg1995,
There are three license models for an Azure VM that's hosting SQL Server: pay-as-you-go, Azure Hybrid Benefit (AHB), and High Availability/Disaster Recovery(HA/DR). You can modify the license model of your SQL Server VM by using the Azure portal, the Azure CLI, or PowerShell.
Only SQL Server core-based licensing with Software Assurance or subscription licenses are eligible for Azure Hybrid Benefit.
If you are using Server + CAL licensing for SQL Server and you have Software Assurance, you can use bring-your-own-license to an Azure SQL Server virtual machine image to leverage license mobility for these servers, but you cannot leverage the other features of Azure Hybrid Benefit.
Do follow the below link to proceed further,
https://learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/licensing-model-azure-hybrid-benefit-ahb-change?tabs=azure-portal
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