Dell Poweredge 2900 Server running Microsoft Windows Small Business Server 2003 with Exchange 2003 SP2. Problem started with event ID 9667s in the event log (on the weekend) - at noon on Monday registry settings were added/changed to increase the following; Named Props Quota, Replids Quota (KB820379) Hotfix 972077 was applied. Problem is this; In the message tracking center, I was able to see that email was received in the 24 hours prior to the server reboot and attempted fixes, and new email is coming in fine, however, mail for the 24 hours prior to the reboot is not appearing in user inboxes. Do I need to do something else to get the missing mail back?

If it really did bounce, then the senders will need to resend - Unless you are journaling or archiving the messages with some other process.

Sorry, I should have elaborated more. the messages don't appear to have bounced back to the sender. If I look in the message tracking center I can see that an email was received; SMTP: Message Submitted to Advanced Queuing SMTP: Started Message Submission to Advanced Queue SMTP: Message Submitted to Categorizer SMTP: Message Categorized and Queued for Routing SMTP: Message Queued for Local Delivery SMTP: Message Delivered Locally to <email address> SMTP Store Driver: Message Delivered Locally to <email address>

You dont see the messages via OWA ? Or searching the entire mailbox? Is this affecting all the mail delivered during that time period or just to a few users?

I don't see the messages in OWA or outlook. Searching doesn't show any messages during that time either. This affected all users and all mail received during that 24 hour period. This article -- http://technet.microsoft.com/en-us/library/bb851495(EXCHG.80).aspx states how to recover if it reached the 32k hard limit - yet this server was using the defaults of 8k. I've since increased it to 16k or 32k (don't remember) To recover a mailbox database Create a new mailbox database on the same server or a different Exchange server with the Mailbox server role installed. Move all mailboxes from the database you need to recover to the new mailbox database. On the Exchange server that has the mailbox database you need to recover, do the following: Dismount the mailbox database you need to recover. Delete the database file that corresponds to the mailbox database you need to recover. Mount the mailbox database. This creates a blank database file for the mailbox database. Move all the mailboxes back to the recovered blank mailbox database.

OK, I know it says it was delivered, but nothing in the queues? I dont think I have ever seen this before honestly.

I sent a test message from another outside email server and it shows delivered fine from the sending end. No mail waiting to be delivered in the queues on the receiving end. Message tracking shows the message following the steps listed above. It's not in junk mail either. It's as if the messages are there but hidden. My next thing to try is to take a mailbox and export it using exmerge and import it on another server and see if all of the mail is there. I would welcome any other suggestions.

I would check the dumpsters of a few mailboxes just to verify the messages didnt end up there.

If max named properties number for a store is reached, messages sent with new named properties will not be delivered to the mailbox as the mailbox residing store already reached max named properties number. The only solution to the issue is, please create new store and move the mailboxes to the new store, then get rid of the old store.After the new store is created and move operation is completed, you should ask the sender to resend the message, if the message is already expired. The below articles provide more details on named properties: http://support.microsoft.com/kb/820379 http://blogs.technet.com/b/exchange/archive/2010/07/29/3410545.aspx