Azure P2S to connect through S2S VPN to onprem

Hello @Thomas Holme Larsen ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

I understand that you have a working site-to-site VPN connection between Azure and your on-premises and also have a point-to-site VPN which is able to access Azure resources but is unable to access the on-premises resources via the site-to-site connection.

In order for you to be able to access your on-prem network (which is connected to Azure VPN by site to site connection) from your Point to site VPN client, your Site-to-Site VPN connection should be running BGP.

If your site to site connection between Azure and On-prem uses BGP, then you can just manually add the routes for your on-prem network to the Windows P2S client and will be able to access the on-prem network from your point to site connection/client. For non-windows clients, you do not need to add the manual routes as BGP is enough for the routes to be propagated.

To manually add the On-prem network route, you can browse to %AppData%\Microsoft\Network\Connections\Cm*yourGuid*\routes.txt (C:\Users\userID\AppData\Roaming\Microsoft\Network\Connections\Cm*VPNGuid\routes.txt*) in your client machine and add the route in this text file.

Please refer : https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-about-point-to-site-routing#vnetbranchbgp

Kindly let us know if the above helps or you need further assistance on this issue.

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