Read MEV1722 DME ISN with Mini ACDP is possible now. This post provides the guide. 
Need:
Mini ACDP host
ACDP Module 3
Image 1: Mini ACDP host and adapters
Source: http://www.obd2shop.co.uk/wholesale/yanhua-mini-acdp-programming-master.html
Image 2: ACDP Module 3
Source: http://www.obd2shop.co.uk/wholesale/yanhua-mini-acdp-read-bwm-dme-isn-code-by-obd-module.html
Please just operate by following the help file.
Here I attach the help files in the app.
Guide:
Step 1: Please prepare ACDP, OBP+ICP adaption, PCAN line and engine.
Step 2: Find the engine port wiring position as shown in the figure.
Step 3: Short the CAN termination resistor on the OBP+ICP adapter to the “CAN-R-Join” terminal.
Step 4: Connect the ACDP, OBP+ICP adapter, PCAN line and engine.
Then, open your phone, tap “BMW” -> “DME ISN” -> “OBD Mode Read /Write IS” -> “Read MEV1722 DME ISN”.
