We recently started seeing the following error in the server’s application event log after we configured ADFS, IFD and update the email router to point to the IFD url.
#26234 – The E-mail Router service could not process a provider work item using assembly: Microsoft.Crm.Tools.EmailProviders.dll and class: Microsoft.Crm.Tools.Email.Providers.SmtpPollingSendEmailProvider. System.NotSupportedException: The authentication endpoint Username was not found on the configured Secure Token Service! at Microsoft.Crm.ServiceProxyCache`1.BuildServiceProxy(Uri serviceUrl, Credential credentials, Uri homeRealmUrl, String passportEnvironment, IServiceConfiguration`1 serviceConfiguration) at Microsoft.Crm.ServiceProxyCache`1.GetNewServiceProxy(Uri serviceUrl, Credential credentials, Uri homeRealmUrl, String passportEnvironment) at Microsoft.Crm.Tools.Email.Providers.Utility.GetOrganizationUrl(Uri discoveryServiceUrl, Credential credentials, String organizationName) at Microsoft.Crm.Tools.Email.Providers.Utility.GetCrmService(Uri discoveryUri, String authMode, String userName, String password) at Microsoft.Crm.Tools.Email.Providers.CrmPollingSendEmailProvider.Run() at Microsoft.Crm.Tools.Email.Agent.ServiceCore.ExecuteProviderWork(Object providerQueueRequestObject)
To resolve the issue we enabled the following endpoint in ADFS 2.0:
Hope this helps someone out there – if you need more assistance please reach out to the MSCRM Experts at PowerObjects