The Microsoft Exchange Unified Messaging service could not create and register the Simple Mail Transfer Protocol (SMTP) service principal name (SPN) for the Unified Messaging server. The Win32 error code returned was “%1”. Delivery of voice mail, missed call notifications, and fax messages will not work correctly until the SPN is registered correctly.

Details
Product: Exchange
Event ID: 1138
Source: MSExchange Unified Messaging
Version: 8.0
Symbolic Name: SmtpSpnRegistrationFailure
Message: The Microsoft Exchange Unified Messaging service could not create and register the Simple Mail Transfer Protocol (SMTP) service principal name (SPN) for the Unified Messaging server. The Win32 error code returned was “%1”. Delivery of voice mail, missed call notifications, and fax messages will not work correctly until the SPN is registered correctly.
   
Explanation

This Error event indicates that the Microsoft® Exchange Unified Messaging service did not start because the service was not able to create and register the Simple Mail Transfer Protocol (SMTP) service principal name (SPN) for the computer that is running the Unified Messaging server role. The SPN is used in Kerberos authentication when the Unified Messaging (UM) server submits voice or fax messages over SMTP to the computer that has the Hub Transport server role installed. This event may be caused by an error in the operating system during the DsServerRegisterSpn function.

For more information about service principal names, see Service Principal Names at the MSDN Web site.

For more information about the DsServerRegisterSpn function, see DsServerRegistrationSpn at the MSDN Web site.

   
User Action

To resolve this error, do the following:

  1. Determine the description of the Win32 error code that is provided in the event description. To look up system error codes, see System Error Codes at the MSDN Web site for more information.

  2. Use the explanation of the Win32 error code as a guideline to resolve the Win32 error.

If this error frequently occurs, contact Microsoft Product Support. For information about how to contact support, visit the Microsoft Help and Support Web site.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

Related:

Leave a Reply