Short Answer 
The access to storage1 for virtual machines (VMs) is determined by checking their IP address range and subnet configurations. VM1 and VM2 meet the necessary criteria with access permissions enabled, while VM3, despite being in the correct IP range, lacks access due to its subnet configuration.
Step 1: Check IP Address Range
The first step is to verify the IP address range of your virtual machines (VMs). In this case, storage1 has a firewall that permits access from the IP address range 13.68.158.0/24. You must check if each VM falls within this range, as it is crucial for accessing the storage resource.
- VM1: within the range
- VM2: within the range
- VM3: within the range
Step 2: Verify Subnet Configuration
The second step involves examining the subnet configuration for each VM. Both VM1 and VM2 are located in Subnet1, which has a Microsoft.Storage service endpoint enabled. This endpoint is essential for allowing low-latency traffic directly to Azure Storage, enhancing performance and connectivity.
- VM1: connected to Subnet1 with service endpoint
- VM2: connected to Subnet1 with service endpoint
- VM3: connected to Subnet2 without service endpoint
Step 3: Determine Access Permissions
The final step is to determine which VMs have access permissions based on the previous checks. Since both VM1 and VM2 are in the allowed IP range and connected to a subnet with the necessary service endpoint, they can access storage1. VM3, while in the IP range, is on a subnet without the required endpoint, so it does not have guaranteed access.
- Access granted: VM1, VM2
- Access denied: VM3