2.5 Monitor ARM VM availability

Configure multiple ARM VMs in an availability set for redundancy, configure each application tier into separate availability sets, combine the Load Balancer with availability sets

Se https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability

2.5.1 Configure multiple ARM VMs in an availability set for redundancy

2.5.2 Configure each application tier into separate availability sets

2.5.3 Combine the Load Balancer with availability sets