DocumentationMarketo EngageMarketo Guide

Release Notes: August 2026 release-notes-aug-26

Last update: August 7, 2026

Below you’ll find all the features included in the August '26 release. Check your Adobe Marketo Engage edition for feature availability.

The Release Notes specifically for Adobe Dynamic Chat can be found here.

Standard Release Cycle Features standard-release-cycle-features

The following features fall under the standard release cycle and will start to be released on August 14, 2026, with a phased rollout of remaining features over the subsequent weeks. Release features and dates are subject to change. Please check next to each feature for its status.

Feature
Status
Documentation
Marketo Engage New UI: The Marketo Engage interface has a refreshed look, including updated menus, icons, and layout for a cleaner, more modern experience. This is a visual update only, no existing functionality or workflows are affected.
Phased rollout throughout the month of August
n/a
Email Designer - Script Builder: Script Builder is an AI-powered assistant that helps you create personalization scripts faster.
Coming soon
Coming soon
Disable Campaigns on Archive: Archiving a folder now disables and deschedules all campaigns in that folder tree, preventing unexpected execution of archived Smart Campaigns.
Coming soon
Coming soon

Announcements announcements

  • Rest API ‘access_token’ Parameter Deprecation: The access_token query parameter used to authenticate Marketo REST API calls is being deprecated and will not be available after August 31, 2026. All new and existing integrations should authenticate REST API calls using the ‘Authorization’ header, as described here.

  • REST API Campaign Run ID: Support for the Marketo SOAP API will end on July 31, 2026. Services which use SOAP API capabilities should be migrated to the REST API.

  • Static List Size Limits for Get Lead Activities and Get Lead Changes: Under certain circumstances, the Campaign Run ID value of an activity was sometimes returned with incorrect formatting, between two pairs of quotation marks (for example, "campaignRunId": ""102938"").
    Beginning with the August release, this value will always be returned with the correct numerical format ("campaignRunId": 102938)

  • REST API Merge Leads limit: As of July 31, 2026, calls that include more than 25 IDs in the leadIds parameter of a Merge Leads API call result in a 1080 error code, and the call is skipped. Jobs requiring the merger of more than 25 records into one should be split into multiple jobs to ensure the success of those calls.

recommendation-more-help
marketo-help-marketo