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Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
Hello Elaheh !
Thank you for posting on MS Learn Q&A.
From the screenshots, I can say that the issue is not the VM size page itself. Your West US 2 Compute quota is already fully used. Look at Standard B-series vCPUs: 4 of 4 and Total Regional vCPUs: 4 of 4
Azure VM quota is checked at 2 levels: the Total Regional vCPU quota and the VM-family quota such as B-series. A new VM can be created only if both quotas have enough available vCPUs.
https://learn.microsoft.com/en-us/azure/virtual-machines/quotas
Resizing existing VMs will not help unless the resize actually reduces the number of allocated vCPUs. Also, Azure quota counts vCPUs used by both allocated and deallocated VMs, so simply stopping a VM does not free quota and you would need to delete unused VMs or reduce their vCPU size.
To create two more VMs in West US 2, request an increase for Total Regional vCPUs in West US 2 and Standard B-series vCPUs in West US 2
You also mentioned you are using the free tier and free Azure trial subscriptions are generally not eligible for quota increases. Only paid subscriptions can request quota increases, and free trial subscriptions must be upgraded to Pay-As-You-Go to request higher limits.