Hello CPPinc,
have a look here:
- Utilities > Line Key Configuration
You should see:
The above example utilizes the attendant.resourceList.x.address. You should be able to simply remove the unwanted one's.
If you cannot see this then your yet unknown SIP server utilizes the attendant.uri instead. This cannot be controlled by yourself and you need to work with whoever setup your system or provides your service.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services