In order to determine the 3DSecure status of the transaction you can view the ECI Flag value in the BIP for any transaction.

Click on the transaction to open the transaction details window (see screenshot).

In the transaction details window you can view this information in the Summary on top or also the details for 3DS in the 3DSecure tab (when available- see below).

The ECI flag value tells you whether it was 3DS or 3DS Attempted. The Values for the ECI flag listed are in the order VISA/MASTER/AMEX :-

Successful 3D Authentication – Liability shift applies

ECI Flag - Visa 05/ Master 02/ Amex 05 

Here the 3DS tab will be available with details

Attempted Processing - Liability shift applies

ECI Flag - VISA 06/ MASTER 01/ AMEX 06 

Here the 3DS tab will be available with details

User Not Enrolled - Liability shift applies

ECI Flag - VISA 06/ MASTER 01/ AMEX 06 

3DS tab may or may not be available depending on whether there was proof of no enrollment provided or not

Technical Error in 3D System – No liability shift – Not allowed for bank processing

ECI Flag - VISA 07/ MASTER 00/ AMEX 07 

Here the 3DS tab will be available with details

Missing or invalid Configuration - No liability shift – Not allowed for bank processing 

ECI Flag - VISA 07/ MASTER 00/ AMEX 07 

You will also get the ECI value 06/01/06 for the timeout where the user never completes the transaction but the overall transaction result will be NOK I.e. Not processed.