Polycom Attendant Remote CallerID Problem

I’m setting up an IP650 with a few attendant lines. These give a visual indication if someones extension is ringing etc which is perfect for a PA/manager role however I can’t get CallerID to work

If someone rings the remote line then it flashes up on the attendant phone that its ringing along with the CallerID of the line that’s ringing but the From field is blank. This should contain the incoming callerid

I have dug around and keep seeing reference to notifycid however when I add this to SIP settings it stops callerid coming across completly.

Has anyone had any success with this?