This article addresses an error that occurs when testing a social or enterprise connection using Azure as the Identity Provider (IdP).

When testing the login, the following error is observed:

AADSTS900971 : No Reply address provided

• Social Connections

• Enterprise Connections

This error is caused by a misconfiguration on the Azure side.

1. In the Azure configuration, ensure the configured callback URL matches one of the following formats:

   • https://<TENANT_NAME>.<REGION>.auth0.com/login/callback

   • https://<CUSTOM_DOMAIN>/login/callback

2. For additional information, refer to this Microsoft resource on the AADSTS900971 error.