Does Milestone’s SDK have the capability to query a field other than the primary ID to get the camera ID or the camera / Is there a way to fetch the camera from not the camera primary ID but from some other metadata that is associated with the camera?
Using VideoOS.Platform.Configuration Class there are GetItemsBySearch and GetItemsBySearchAsync methods. Documented here.
For using the Configuration in general I recommend that you explore the Configuration Access sample. Find sample code here.