Technical Tip: Upgrading Azure Firewall VM Size (VM-02 to VM-04 or VM-04 to VM-08) and registering the new contract

[ManpreetSingh]

Description	This article describes how to upgrade an Azure Firewall VM size, taking the resize from VM-02 to VM-04 as an example, including registering the new contract and resizing the virtual machine.
Scope	FortiGate.
Solution	To upgrade an Azure Firewall from VM-02 to VM-04, follow these steps: Schedule a Maintenance Window: Ensure a maintenance window is scheduled, as the upgrade process may cause downtime. Back up the current configuration. Register the New Contract: Register the new contract in the Fortinet portal. If the new contract has a different CPU count than the existing one, it cannot be registered as an upgrade. In this case, the new contract will be registered as a new serial number. Resize the Virtual Machine: Resize the virtual machine to match the new license's vCPU requirements.  Shut down the VM. Go to the Azure portal and navigate to the VMs page, then go to Availability + Scale -> Size and select the desired size. Apply the new license. Turn on the VM and apply the new VM-04 license on the FortiGate. Reboot the firewall and Verify Functionality: Reboot the firewall after applying new VM-04 License and verify that the Azure firewall is functioning as expected.