IKE Main Mode negotiation fails with error "invalid id" when Check Point Security Gateway has ISP redundancy configured, and VPN peer is 3rd party
![IPsec/IKE policy for S2S VPN & VNet-to-VNet connections: PowerShell - Azure VPN Gateway | Microsoft Learn IPsec/IKE policy for S2S VPN & VNet-to-VNet connections: PowerShell - Azure VPN Gateway | Microsoft Learn](https://learn.microsoft.com/en-us/azure/vpn-gateway/media/vpn-gateway-ipsecikepolicy-rm-powershell/ipsecikepolicy.png)
IPsec/IKE policy for S2S VPN & VNet-to-VNet connections: PowerShell - Azure VPN Gateway | Microsoft Learn
Configure IPsec/IKE site-to-site VPN connections in Azure Stack Hub - Azure Stack Hub | Microsoft Learn
![IPsec/IKE policy for S2S VPN & VNet-to-VNet connections: Azure portal - Azure VPN Gateway | Microsoft Learn IPsec/IKE policy for S2S VPN & VNet-to-VNet connections: Azure portal - Azure VPN Gateway | Microsoft Learn](https://learn.microsoft.com/en-us/azure/vpn-gateway/media/ipsec-ike-policy-howto/policy-diagram.png)