Update quotas.md

-------
cc: @cynthn

Author: mimckitt

articles/virtual-machines/windows/quotas.md

@@ -16,7 +16,8 @@ ms.author: cynthn
 
 The vCPU quotas for virtual machines and virtual machine scale sets are arranged in two tiers for each subscription, in each region. The first tier is the Total Regional vCPUs, and the second tier is the various VM size family cores such as the D-series vCPUs. Any time a new VM is deployed the vCPUs for the VM must not exceed the vCPU quota for the VM size family or the total regional vCPU quota. If either of those quotas are exceeded, the VM deployment will not be allowed. There is also a quota for the overall number of virtual machines in the region. The details on each of these quotas can be seen in the **Usage + quotas** section of the **Subscription** page in the [Azure portal](https://portal.azure.com), or you can query for the values using PowerShell.
 
-   
+> [!NOTE]
+> Quota is calculated based on the total number of cores in use both allocated and deallocated. If you need additional cores, [request a quota increase](https://docs.microsoft.com/azure/azure-portal/supportability/resource-manager-core-quotas-request) or delete VMs that are no longer needed. 
  
 ## Check usage