This Error event indicates that the version of the e-mail address generator on the server does not match the version of the e-mail address generator in Active Directory.

Exchange will try to locate a copy of the dynamic link library on other Exchange servers within the routing group first. If that fails, it will search Exchange servers that are located in other Administrative Groups.

To resolve this error, do the following:

1. Use an Active Directory tool such as ADSI Edit to examine the fileversion attribute of the third-party proxy address dynamic link library file (.dll) in the Address-Type container in Active Directory. This container is located in the Configuration context of Active Directory under the Services/Microsoft Exchange/<Organization>/Addressing/Address-Types.
   
   
2. In the result pane, right-click the third party proxy address .dll file, such as X400, and then click Properties. The fileversion attribute of the address type will be in hexadecimal format:
   
   18 00 AD 02 00 00 08 00
   
   Convert this to decimal by reversing the order of the bits and grouping them in words:
   
   0008-0000-02AD-0018
   
   Now convert the hexadecimal to decimal:
   
   0008 is 8
   
   0000 is 0
   
   02AD is 695
   
   0018 is 24
   
   The file version is 8.0.695.24.
   
   
3. Compare the version obtained in the previous step with the file version of the file that is found on the local hard disk under C:/Program Files/Microsoft/Exchange Server/V14/Mailbox/Address/<type>/<type>.dll. Where C:/ is the directory in which you installed Exchange, and type is the third party address type. Right-click the .dll file, and then click Properties. Click the Details tab to find the file version.
   
   
4. If the file versions do not match, update the .dll file to the same version found on the file version attribute in Active Directory. If the file versions match, contact Microsoft Customer Support Services for help. For information about how to contact support, visit Microsoft Help and Support.
   
   

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.