Hey, @Susan2153262010 Great question!
Use the IVR Transfer if:
You want a "Hard Cut." If your office closes at 5:00 PM and you want every call after that second to go straight to the service without hitting your internal system at all, the IVR is the most stable and professional method.
Use the Call Queue Setting if:
You want a "Soft Cut." If you have staff who occasionally work late and you want the flexibility to handle a few calls before they "overflow" to the external service, the Queue settings provide more granular control.
Regardless of which you choose, ensure "Outbound Caller ID" is set correctly in your RingCentral portal. You likely want to see the original caller's ID (not your own RC number) so your after-hours service knows who is calling!
Let me know if this helps or if you have additional questions.