I have a mailbox that is rejecting some messages from two individuals with a MapiExceptionNamedPropsQuotaExceeded error in the reject message. I have seen this problem quite some time ago, but it was supposed to have been fixed in Exchange 2007 SP1, Rollup 8. I am at SP3, Rollup2, but I still have this problem with one of my mailboxes. Did this problem not actually get fixed? How can I fix this with the least disruption to my users? As I understand it, these X-headers are allocated fot the message database rather than the individual mailbox. If I create a new message database and move the user into it, should that correct the problem? Thank you for your help.

This describes it in detail. http://blogs.technet.com/b/exchange/archive/2009/04/06/3407221.aspxEd Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hello, Please refer to the article shared by Ed. To answer your question, the issue can be work around by moving the mailbox to a new database. Thanks, Simon

Thank you very much, Ed and Simon. This answers my question. I appreciate the help very much.