Microsoft Surface Hub 2 SmCamera - Manual (Page 480)

If the warranty for your Surface Hub 2S is expired, you can order a replacement pen
directly through the
Microsoft Store .
If your device is still covered under warranty, please create a support request and
include the following items as it will help speed up the process:
Results of troubleshooting steps on this page.
Shipping address and recipient contact information.
Serial number of the
Surface Hub 2S (not the pen itself).
You can find the serial number on the outside of the packaging, on the display by
the power cord, or by using the Surface app.