Hello India Pro,
Thanks for your question.
You can do this using the sign-in logs.
In the Azure portal, search for and select Entra ID.
In the Overview page menu, select Sign-in logs for a user.
Select the Additional details tab or an ellipsis.
See if the "Legacy TLS (TLS 1.0, 1.1, or 3DES)" field is present:
If this field exists and shows a value of "True", then the sign-in attempt used an older version of TLS (likely TLS 1.0 or 1.1).
- If the field is completely absent, the connection likely used TLS 1.2 or a newer, more secure version.
Please let me know if you have further questions**
You can mark it 'Accept Answer' if this helped.