Hello @Sabarimani Ramalingam ,
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
If you use Basic VPN gateway for your P2S connections using Certificate Authentication then it only supports SSTP protocol.
If that’s the case then I think you will find what you are looking for in this link: Add VPN settings to devices in Microsoft Intune | Microsoft Learn
Kindly let us know if the above helps or you need further assistance on this issue.
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