# Cutover morning is a checklist, not a mood · Learn it in 5 minutes

- The morning the numbers move, the domain should already contain skills, a script, a running inbound campaign, loaded lists, dispositions, DNC, an assigned profile, and a desktop the agent has signed into. E911 addresses have to be dispatchable for the place the agent actually is. A stale office address is not a courtesy.
- Keep a backout that does not depend on a disabled Five9 domain's DIDs surviving past their retention window. Test one DNIS, one outbound record, one pop, and one 911 procedure in the lab domain before the carrier repoints the range.

## Sources and go deeper

- [Planning your implementation](https://documentation.five9.com/bundle/basic-admin/page/basic-admin/intro/planning-your-implementation.htm). vendor. last checked 2026-10.
- [Inbound campaigns](https://documentation.five9.com/bundle/campaign-admin/page/campaign-admin/creating-campaigns/types-of-campaigns/inbound-campaigns.htm). vendor. last checked 2026-10.
- [E911 data sheet](https://www.five9.com/sites/default/files/2022-11/Data-sheet-Five9-emergency-services%20%28E911%29.PDF). vendor. last checked 2026-10.
- [Data retention](https://www.five9.com/legal/dataretention). vendor. last checked 2026-10.
- [Technical requirements PDF](https://documentation-be.five9.com/bundle/five9-technical-requirements/raw/resource/enus/five9-technical-requirements.pdf). vendor. last checked 2026-10. Fetched for this lab in October 2026. Re-read before you buy hardware or open a firewall.
- [ITU-T E.164, international public telecommunication numbering](https://www.itu.int/rec/T-REC-E.164). standard. last checked 2026-10.
- [Enhanced 9-1-1](https://en.wikipedia.org/wiki/Enhanced_9-1-1). wikipedia. last checked 2026-10.
- confirm. This checklist is a teaching bridge for cutover discipline. It is not an official Five9 UCCE runbook. last checked 2026-10.