Issue symptoms

I am trying to integrate my Facebook page, but the following error message shows: Channel couldn't be added. Facebook page already in use.

Resolution steps

This error means that the Facebook page has been previously associated with another Zendesk subdomain or trial account.

If you still have access to the old subdomain, remove the Facebook page from there and retry.

If you do not have access to the previous account, contact Support by using the widget at the bottom of this page. Provide the following pieces of information:

Facebook business page link
Old subdomain
New subdomain

For more information, see this article: Adding Facebook Messenger channels to the Zendesk Agent Workspace.