When you do a test access from the Email Router you get the following error message:
Name: CRM User
Incoming Status: Failure - No results were found.
The event viewer error is as follows:
#26090 - An error occurred while opening mailbox user@domain.com. Microsoft.Crm.Tools.Email.Providers.EmailException: No results were found.
at Microsoft.Crm.Tools.Email.Providers.ExchangeWSConnector.IsCurrentUser()
at Microsoft.Crm.Tools.Email.Providers.ExchangeWSConnector.GetService()
at Microsoft.Crm.Tools.Email.Providers.ExchangeWSConnector.OpenMailbox()
at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.InitExchangeConnector()
at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.OpenMailbox()
at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.Run()