It is possible use the icom a2 to work in the e-sys??
Yes, just lock it with EasyConnect, obd_ab625 and then insert your ICOM IP in ESYS connection manager.
Connect the BMW ICOM A2, turn the ignition on, start f.e. iToolradar. Now you can see the connection from the ICOM (normally on 126.96.36.199), mark it and click on reserve
(in EasyConnect is different but as easy as itoolradar).
Connect and have fun.
Note: TRY ON YOUR RISK. The instruction via pictures is kind of different that via words, especially ICOM IP setup. Both can be tried.