@Bartłomiej Olejnik Thank you for reaching out to Microsoft Q&A. We apologize for the delay in responding to your question.
I understand that you have questions regarding monitoring your P2S VPN connection. All the user information related to AAD with P2S can be seen in the AAD Portal. If you navigate to the Sign-in Logs in AAD, it should have the user information as shown below:
It shows the username, application they are trying to access and the sign-in errors if any as well as the location that they are connecting from. Hope this answers your question.
Please let us know if you have any further questions and we will be glad to assist you further. Thank you!
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