most of the emails are stuck in "Sending " state with below exception on on the email router. I would like to know which account will change the status of the email from "Pending send" to "Sending" to "Sent" in CRM.
#26234 - The Email Router service could not process a provider work item using assembly: Microsoft.Crm.Tools.EmailProviders.dll and class: Microsoft.Crm.Tools.Email.Providers.ExchangeOnlinePollingSendEmailProvider.
System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Crm.Tools.Email.Providers.CrmPollingSendEmailProvider.HandleProcessMessageError(Exception exception, Entity emailMessage)
at Microsoft.Crm.Tools.Email.Providers.CrmPollingSendEmailProvider.Run()
at Microsoft.Crm.Tools.Email.Agent.ServiceCore.ExecuteProviderWork(Object providerQueueRequestObject)
#61042 - An error occurred while processing the outgoing email message with subject "subject of email message" for ExchangeOnline:
https://disco.crm.dynamics.com/XXXX for delivery through
https://outlook.office365.com/EWS/Exchange.asmx. System.Net.WebException: The request failed with HTTP status 401: Unauthorized.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Microsoft.Crm.Tools.Email.Providers.ExchangeServiceBinding.CreateItem(CreateItemType CreateItem1)
at Microsoft.Crm.Tools.Email.Providers.ExchangeOnlinePollingSendEmailProvider.SendMessage(MessageType mailMessage)
at Microsoft.Crm.Tools.Email.Providers.ExchangeOnlinePollingSendEmailProvider.ProcessMessageInternal(Entity emailMessage)
at Microsoft.Crm.Tools.Email.Providers.CrmPollingSendEmailProvider.Run()