Zendesk SSO Integration Not Working: "Callback URL mismatch" Error

This article explains a potential cause of the following error when trying to use the Zendesk SSO integration:

Callback URL mismatch. https://(Zendesk Account Name).zendesk.com/access/saml is not in the list of allowed callback URLs

Troubleshooting

Check the tenant logs for the domain name used for the callback URL.

• Zendesk

• Each brand has its subdomain.
• If a brand's subdomain is mistakenly used for a Zendesk Account Name while creating a Zendesk SSO Integration in the CIC tenant, it will not work.
• The Zendesk Account Name has to be set to the main/parent domain.

Use the main/parent domain as the Zendesk Account Name.