This ARM template and configuration was borrowed from https://redeploy.se/deploy-unifi-controller-in-azure/
It is no longer being maintained, and I needed it so I have cloned it, pruned the other projects out, and just kept the Unifi bits (and commit history).
This ARM template installs and configures the Unifi Controller software on an Ubuntu VM. It also creates and deploys a full Azure infrastructure configuration for the VM, including NSG ports using your public IP.
Click the above link and fill in the required info for install! Please note that the storage account name is created by appending 'sa' to the server name, so if you have an error that the storage account name is not unique, modify the server name.
Access your Unifi controller via https://yourAzureVMPublicIP:8443
For instructions on setting up your Unifi controller, please see this document.
For instructions on AP adoption, please see the section starting on page 168, Layer 3 adoption. DNS, DHCP, or SSH'ing directly into the AP are all valid.