We have just purchased a new P370 and PM200 for reception.
I have programmed the P370 and added the PM200-1 to the configuration template via EPM. I have also made sure that under Extension Settings, the extension has the Expansion Module 1 set to PM200-1.
The phone works fine but nothing is displayed on the sidecar. I have tried Speeddial buttons, BLF’s and the App’s.
Currently running firmware 4.13.3 and EPM 18.104.22.168