# Link Shortening

The campaign's **Settings → Link Shortening** tab controls the domain the campaign uses to shorten links for campaign outreach. Pick one of your company's configured domains from the **Domain** dropdown, and Aktify's link shortening process will use it when leads are submitted via API and have a link provided in the `linkToShorten` field.

Please see the [Link Shortening documentation](/link-shortening) and the [reference API documentation for submitting leads via API](/api/create-lead).

## When a domain can be set or changed

A campaign's link-shortening domain can only be assigned, changed, or removed while the campaign is **stopped**.

- While the campaign is **running**, the domain is locked (shown with a 🔒 icon) and can't be changed or removed.
- Clients can't stop a campaign from the Portal. If you need to change or remove the domain on a running campaign, contact your **Aktify Account Executive** to have the campaign stopped first; once it's stopped, you can update the domain here.

## If no domains are available

If the dropdown has no domains to choose from — or you see a message that link shortening isn't set up — it hasn't been configured for your company yet. Contact your **Aktify Account Executive** to get it set up.