You have two subscriptions named staging and testing. Each subscription is linked to a different Azure AD tenant. The staging subscription contains a virtual network named vnet1 that has an IP address space of 10.0.0.0/16. The virtual network has a virtual machine named demovm. The testing subscription contains a virtual network named vnet2 that has an IP address space of 10.10.0.0/24. The virtual network has a virtual machine named testvm. You need to connect vnet1 to vnet2. Which of the following would you first implement for this requirement?