> ## Documentation Index
> Fetch the complete documentation index at: https://docs.atllasx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Editing a Campaign

> When you can change campaign settings, and what to do once a campaign is running.

Outbound campaigns are editable **only before they start dialing** — when their status is **Draft** or **Scheduled**. Once a campaign is running, the API rejects edits with a 409 response: *"Campaign is no longer editable. Please duplicate it and try again."*

## Editing a Draft or Scheduled Campaign

While a campaign is in **Draft** or **Scheduled** status, you can edit:

* Campaign name
* Contact list (recipients)
* Call script and call details (`userPrompt`)
* Voice and voice settings (Speech Rate, Stability, Similarity Boost)
* AI Speaks First first message
* Voicemail message
* SMS follow-up template and SMS data (meeting link, sender name, promo code)
* Email follow-up template and missed-call email template
* Schedule (calling hours, days of week, daily call limit)
* Call forwarding number and Warm Transfer toggle
* Background ambiance (Background Sound)
* Keypad dialing toggle
* Industry and language
* Scheduled launch date/time

## Once a Campaign Is Running

Running campaigns cannot be edited. If you need to change something:

1. **Cancel the campaign** — open it from the dashboard and click **Cancel Campaign**.
2. **Duplicate it** — create a new campaign from the existing one.
3. **Edit the duplicate** while it's still in Draft, then launch.

## Cancelling a Campaign

Cancelling stops a running campaign permanently. Calls already placed are preserved in the results. Remaining queued contacts will not be called.

<Warning>
  Cancelling a campaign is irreversible. There is no pause/resume — once cancelled, you must duplicate the campaign to dial the remaining contacts.
</Warning>