Exchange 2010. A user left and permanently deleted all of their email. We only need the last two weeks of external inbound email and we have a Barracuda Spam and Virus Filter for email. When I try to re-deliver the messages in question, the Barracuda connects to the Exchange 2010 server and hands off the message, but it never gets delivered. As a workaround, I set up a test account and assigned it the same email address as the original account. I assigned the original account a different new email address. The Barracuda successfully delivers the original email to the new account. Why doesn't Exchange allow me to redeliver the message to the original account? Thank you for your time. I do have backups, but the Barracuda was the absolute easiest way if it were working correct with Exchange for redelivery.

It should've went through sounds more like a Barracuda issue, was the original account disabled and does Barracuda do ldap filtering and not deliver to disabled accounts?James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Thank you for the fast reply. I checked with Barracuda and confirmed that the message is being handed off properly to the Exchange server with a 250 response. Account is not disabled and is not hidden or anything. New email comes in fine to the account.

Maybe duplicate message detection, but strange because if the timestamp of the old and re-delivered message is more than an hr which in this case it is the message will still be delivered. Do message tracking and see if it you see any evenID for duplicate detection. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Since it is referring to external users, how do I see incoming emails in the log if the name doesn't appear in the GAL? Thank you.

When you track it set the recipient as the original user. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Thanks. I tried to do that, but it's asking for the sender of an email for incoming emails and the sender isn't in the GAL. Obviously, I'm in the wrong place.

Use this command to help you check: Get-Messagetrackinglog -recipients originaluser@domain.com -MessageSubject Emailsubject|fl Thanks, Evan Liu TechNet Subscriber Supportin forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support

Thank you. The last part of the response from the command you suggested shows up as a duplicate deliver. Is there a way around that and have it delivered? RunspaceId : 50be2dce-577a-4281-8808-6b640ed4c081 Timestamp : 8/7/2012 10:26:43 AM ClientIp : ClientHostname : birch ServerIp : ServerHostname : birch SourceContext : 08CF190051BF0DAC;2012-08-07T17:26:43.330Z;0 ConnectorId : Source : STOREDRIVER EventId : DUPLICATEDELIVER InternalMessageId : 2990746 MessageId : <717603828633FD468802E9C2F235D7D735424FED@EXCHMBX03.xcoe.xcoe> Recipients : {myuser@usd.k12.ca.us} RecipientStatus : {} TotalBytes : 20264 RecipientCount : 1 RelatedRecipientAddress : Reference : MessageSubject : FW: Principal Apportionment Payment Calculator Sender : otherguy@k12.ca.us ReturnPath : otherguy@k12.ca.us MessageInfo : 2012-08-07T17:26:43.018Z MessageLatency : MessageLatencyType : None EventData : {[MailboxDatabaseName, mailbox database 0773310059], [DatabaseHealth, -1]}

Yes you can let it age out faster from default 7 days to something much shorter. DeliveredTo Expiration in Hours How to Configure Duplicate Message Detection in Exchange 2007 http://technet.microsoft.com/en-us/library/dd577073(v=exchg.80).aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

I tried a little low tech research and found a key at: HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersPrivate There's a TrackDuplicates key and the value is 1. Am I in the right arena and what should I change? Thank you.

Yes you can let it age out faster from default 7 days to something much shorter. DeliveredTo Expiration in Hours How to Configure Duplicate Message Detection in Exchange 2007 http://technet.microsoft.com/en-us/library/dd577073(v=exchg.80).aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

I hate to be so granular with my questions, but would it be a 32-bit or 64-bit DWORD? The version we have is 64-bit. Thanks, again.

32bit is fine.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Thank you. I'll reboot this evening and try it and report back.

I tried a little low tech research and found a key at: HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersPrivate There's a TrackDuplicates key and the value is 1. Am I in the right arena and what should I change? Thank you. Yes, you can know more detail from this document: Messages that have duplicate message IDs are deleted when they are archived to an Exchange 2007 mailbox http://support.microsoft.com/kb/975990 Thanks, Evan Liu TechNet Subscriber Supportin forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support

Thank you. Worked out well.