---
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title: Improve Security in Bring Your Own Channel by Migrating to an External Client App
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/260-0-0/rn_messaging_byoc_eca.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_messaging_byoc_eca.htm&release=260&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 702de2c1bad15695f47311b96d6c9d188edd8b0ee8c8c300541b1f4ec6dacc68
description: External client apps (ECAs) are the next generation of connected apps, designed to improve security and address packaging and distribution issues. While existing connected apps for Bring Your Own Channel integrations will continue to work, you won’t be able to create new connected apps without first requesting the ability from Salesforce Support starting with Spring ’26. This step is part of a Salesforce plan to eventually replace connected apps with ECAs. Consider migrating to an external client app for Bring Your Own Channel.
products:
  - Cross Cloud Packages Solutions
release: "260"
---
# Improve Security in Bring Your Own Channel by Migrating to an External Client App

External client apps (ECAs) are the next generation of connected apps, designed to improve security and address packaging and distribution issues. While existing connected apps for Bring Your Own Channel integrations will continue to work, you won’t be able to create new connected apps without first requesting the ability from Salesforce Support starting with Spring ’26. This step is part of a Salesforce plan to eventually replace connected apps with ECAs. Consider migrating to an external client app for Bring Your Own Channel.

**Where:** This change applies to Bring Your Own Channel for Messaging and Bring Your Own Channel for CCaaS. [View required editions](https://help.salesforce.com/s/articleView?id=service.messaging_editions.htm&language=en_US).

**Who:** This change impacts partners who create messaging provider integrations for Bring Your Own Channel for Messaging or Bring Your Own Channel for CCaaS. It also affects customers who have self-implemented Bring Your Own Channel for Messaging or manage their own authentication between Interaction Service API and their integration.

**How:** Inventory your connected apps and begin migrating to ECAs to prepare for the end of support. Use second-generation (2GP) packaging for an Bring Your Own Channel integration that uses an external client app. If you must create a new connected app, contact Salesforce Support to request access to this functionality.

#### See Also

- [_Salesforce Knowledge Article:_ New connected apps can no longer be created in Spring ‘26](https://help.salesforce.com/s/articleView?id=005228017&type=1&language=en_US)
- [_Bring Your Own Channel for CCaaS Developer Guide:_ Create the Interaction Service OAuth App](https://developer.salesforce.com/docs/service/messaging-byoc-ccaas/guide/create-connected-app.html)
- [_Bring Your Own Channel for Messaging Developer Guide:_ Create the Interaction Service OAuth App](https://developer.salesforce.com/docs/service/messaging-partner/guide/create-connected-app.html)
- [_Salesforce Help:_ Set Up and Configure Your Own OAuth App for Bring Your Own Channel (can be outdated or unavailable during release preview)](https://help.salesforce.com/s/articleView?id=service.byoc_customer_connected_app.htm&language=en_US)