To resolve this error, make sure that the user account specified in the message has a correctly configured SMTP e-mail address. For information about SMTP address mismatches and how to resolve MSExchangeSA event 9325, see "Simple Mail Transfer Protocol Address Mismatches" in Improvements for Offline Address Books.
For more information about this event, see the Microsoft Knowledge Base article 555405, Event ID 9325 is logged by MSExchangeSA while generating Offline Address List.
You can use the proxytest test of the Offline Address Book Integrity tool (OABInteg) to identify the e-mail address that does not match the primary SMTP address for a user. For information about how to use OABInteg, see Microsoft Knowledge Base article 907792, Description of the Offline Address Book Integrity (OABInteg) tool.
For information about troubleshooting offline address book issues, see the Technet Support WebCast, How to troubleshoot Offline Address Book issues in Microsoft Exchange Server.
You can use the Offline Address Book Integrity (OABInteg) tool to troubleshoot offline address list problems. For information about how to use the OABInteg tool, see Microsoft Knowledge Base article 907792, Description of the Offline Address Book Integrity (OABInteg) tool.
For best practices for administering offline address lists, see the Offline Address Book Best Practices Guide.