GET a Collection of V2 and V3 API Email Campaign Identifiers

<div class="Msg Msg--warning"><p class="note-text">Use this endpoint to migrate your locally stored V2 email campaign data to the new V3 format. Developers are expected to use this endpoint sparingly. This endpoint is NOT intended for regular or repeated use. Constant Contact will eventually deprecate and remove this endpoint.</p></div>

Use this method to migrate your local V2 API email data to the V3 API format. For each value that you provide in the v2_email_campaign_ids query parameter, this method returns the corresponding V3 campaign_id and V3 campaign_activity_id UUID value. For more information on the changes to the email campaign resource model, see V3 Email Campaign Resource Changes in the API guide.

{
  "xrefs": [
    {
      "v2_email_campaign_id": "1100567546598",
      "campaign_id": "e4cf53f0-e37f-11e8-9f32-f2801f1b9fd1",
      "campaign_activity_id": "4c08372c-957a-48b5-bc45-72c7f00796cd"
    }
  ]
}