Guides · 119
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6The error or symptom in front of you, and the fix.Networking & VMs
Azure virtual network explained for app builders: subnets, private endpoints and DNS in one picture
The Azure virtual network explained for people who build apps, flows and agents rather than networks: what a VNet and its subnets are, how network security groups decide, why a private endpoint needs DNS, the new private-subnet default, and how Power Platform plugs in.
Networking & VMs
"Exceeding approved quota" when you create an Azure VM: which quota, and how to raise it
"Operation could not be completed as it results in exceeding approved quota" means your subscription's vCPU limit for that VM family or region is used up, not that Azure is full. Read which quota the error names, check usage, request the increase, and tell it apart from AllocationFailed and SkuNotAvailable.
Networking & VMs
Azure VM has no outbound internet access: private subnets are the new default
A new Azure VM that can't reach the internet, activate Windows or install updates is usually in a private subnet, which new virtual networks now get by default. How to tell, which explicit way out to add (NAT Gateway for most), and the stop-and-deallocate step people miss.
Networking & VMs
Power Platform virtual network support: the pre-flight checklist for regions, subnets and delegation
Power Platform virtual network support lets plug-ins and connectors reach private Azure resources through a subnet you delegate. Check these before you switch it on: Managed Environments, the paired Azure regions, subnet size, which connectors are supported, DNS, and what happens to calls to the public internet.
Networking & VMs
Private endpoint DNS from on-premises: DNS Private Resolver or a forwarder in Azure
Your VPN or ExpressRoute is up, yet on-premises machines still get the public IP for a private endpoint, because your DNS servers can't reach Azure's resolver. Set up DNS Private Resolver's inbound endpoint and a conditional forwarder, the subnet it needs, and how to test each hop.
Networking & VMs
Private endpoint resolves to a public IP: fix private DNS step by step
When a private endpoint resolves to a public IP, or to NXDOMAIN, the endpoint itself is usually fine and DNS never reached your private zone. Five checks in order, from nslookup to the zone link, the A record and custom DNS servers, with the fix for each.