All 3 VM has IIS installed.
I have attached the sample network diagram.
I have Site to Site VPN setup between VNet1 and VnetB.
VM1 is able to access the VM2 at VNetB. VM2 is also able to access the VM1.
I have peered VnetB and VnetC with Traffic to remote virtual network- Enabled, Traffic forwarded from remote virtual network- Enabled.
But i am not able to reach VM3 from VM1 or VM1 to VM3.
I have added the route to both 10.2.0.0/16 and 10.3.0.0/16 on VM1 but still not working.
The VM3 also doesnot have any route to 10.4.0.0/16 on this routes if i check the routes on its NIC.