We use handsets and also link to our CRM Pipedrive. We have 3 handsets each with their own user/extension. All phones are on simultaneous ring. If someone else picks up the phone, my handset and CRM show that I missed a call.
It'd be great if we had to ability to turn off missed call tagging. Even if we miss a call it rolls over to our answering service so the missed call tagging just creates confusion and frustration that I have to clear the notifications on my handset and CRM everytime someone calls.