Dynamics CRM 2011 2013-(An error occurred while opening mailbox xxx@xx.com Microsoft.Crm.Tools.Email.Providers.)

An error occurred while opening mailbox  Microsoft.Crm.Tools.Email.Providers.

Whenever I check how CRM is doing internally I always check the event viewer to see if there’s anything going wrong with Dynamics CRM. The most common error I see in the event viewer is:

#26090 – An error occurred while opening mailbox ‘user@domain.com’. Microsoft.Crm.Tools.Email.Providers.EmailException: The remote Microsoft Exchange e-mail server returned the error “(401) Unauthorized”. Verify that you have permission to connect to the mailbox. —> 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.ResolveNames(ResolveNamesType ResolveNames1)    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()    — End of inner exception stack trace —    at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.WrapException(Exception e)    at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.InitExchangeConnector()    at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.OpenMailbox()    at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.Run()\r\nSystem.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.ResolveNames(ResolveNamesType ResolveNames1)    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()

This issue is actually fairly simple to solve, and you can these details in less detail by opening the ‘Microsoft Dynamics CRM E-mail Router Configuration Manager’, clicking the ‘Users, Queues and Forward Mailboxes’ tab, selecting ‘Load Data’.

Once you’ve done that, click on the mailbox where the error is showing up (user@domain.com) and press ‘Test Access’, you should then see something along the lines of:

Dynamics CRM 2011 2013-(An error occurred while opening mailbox xxx@xx.com  Microsoft.Crm.Tools.Email.Providers.)

The solution to this is:

- Check the ‘E-Mail Access Configuration’ settings are correct (User administration in CRM) - That the username and password in the users queue is correct (‘Queue Information -> ‘Configure Credentials for E-Mail Router’ - Log into CRM as the user, go into personal settings (File -> Options -> Email) and make sure the username and password there is correct.

If all the settings have been corrected, re-test user access and you should now see the following:

Dynamics CRM 2011 2013-(An error occurred while opening mailbox xxx@xx.com  Microsoft.Crm.Tools.Email.Providers.)

Note: If this fails to work, usually Exchange is having an issue or the email configuration itself needs to be reconfigured to meet any network changes you might have made.

Cheers,

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