Tracking down the cause of a DuplicateDeliver email (Exchange 2010 SP2 RU8)

I am in the process of tracking down the reason an email is showing DuplicateDeliver in the message tracking logs (and not arriving in the client's mailbox). I have been attempting to search for the original message based upon the message ID or even
the Internal message ID is not producing any results.
The issue stems from an application that will send a batch of 18 emails to a specific mailbox with status messages and attachments. Periodically one of the 18 messages will not make it to the mailbox. I managed to trace the latest missing email through
our MTA, to the receive connector on our hub server (Exchange 2010 SP2 RU8) and finally to the message tracking logs where I see this:
Source : STOREDRIVER
EventId : DUPLICATEDELIVER
I have read threads on attempting to track this down based on the message ID's and have read the EHLO blog post on how/why DuplicateDeliver happens...now I just need to figure out why this application is having this happen periodically.
Any suggestions on how find the missing piece of the puzzle would be greatly appreciated.
Thanks
MT

Hi Ravenmike,
Duplicatedeliver event occurs if the sender domain is send email with the same message ID to exchange server. By default the duplicate detection is set to 1 hour and these event after
generated by store.
For more information about duplicate detection, please check below article on Exchange team blog:
http://blogs.technet.com/b/exchange/archive/2004/07/14/183132.aspx
Do we have additional third party mail server? It maybe the third party mail server which sending multiple email with same message ID to Exchange.
Hope it is helpful
Thanks
Mavis
Mavis Huang
TechNet Community Support

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    "I was looking for the same error and found this.. it basically says that this is a bug in RU4 and RU4-v2...and it needs to be removed."
tests using troubleshooting scripts find no issues with search indexer,
    [PS] C:\Program Files\Microsoft\Exchange Server\V14\scripts>.\Troubleshoot-CI.ps1
    Get-EventLog : No matches found
    At C:\Program Files\Microsoft\Exchange Server\V14\scripts\CITSLibrary.ps1:622 char:40
    + $msftesqlCrashes = get-eventlog <<<< -computername $Server -after $StartTime -logname "Application" -source $msftesqlServiceName | where {$_.eventId
    -eq $msftesqlCrashEventId}
        + CategoryInfo : ObjectNotFound: (:) [Get-EventLog], ArgumentException
        + FullyQualifiedErrorId : GetEventLogNoEntriesFound,Microsoft.PowerShell.Commands.GetEventLogCommand
    Name IsDeadLocked CatalogStatusArray
    SERVERNAME False {DATABASENAME\SERVERNAME, DATABASENAME\S...
    [PS] C:\Program Files\Microsoft\Exchange Server\V14\scripts>
and tests against searches on each DB themselves show no issues and respond typically within 3 seconds.
    [PS] C:\Program Files\Microsoft\Exchange Server\V14\scripts>Test-ExchangeSearch | ft Server, Database, ServerGuid, ResultFound, SearchTimeInSeconds, Error -AutoSize
    Server Database ServerGuid ResultFound SearchTimeInSeconds Error
    SERVERNAME DATABASENAME b16e3461-257c-40dd-a9ad-99a5f41a927e True 2.937
I also tried to check the Performance Viewer for the MSExchange Search Indexer and MXExchange Search Indices but am unsure which of the many metrics would indicate this issue.
We have had no reports of search issues from our users and have been unable to duplicate any impairment in our testing.
Does anyone else have any suggestions for tests to check or steps to take on this alert? Is it simply a false alarm or a timeout of other sorts during testing? We have 80 DAGs on this server (as well as all our servers, some of which have also reported the
same alert) and the Test-ExchangeSearch command times out before completely testing all DAGs.

Hi IAMChrisL,
Any updates?
Frank Wang
TechNet Community Support

Error to Move the Database Path to another disk Exchange 2010

Im running Windows Server 2008 with exchange 2010 installed.
My C:
drive is full, I mean move
the mailbox database to drive E: ,
but I get an error:
Summary: 1 item(s). 0 succeeded, 1 failed.
Elapsed time: 00:18:11
Mailbox Database 0219108796
Failed
Error:
Processing data for a remote command failed with the following error message: The WinRM client cannot complete the operation within the time specified. Check if the
machine name is valid and is reachable over the network and firewall exception for Windows Remote Management service is enabled. For more information, see the
about_Remote_Troubleshooting Help topic.
Exchange Management Shell command attempted:
move-DatabasePath -Identity 'Mailbox Database 0219108796' -EdbFilePath 'E:\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 0219108796\Mailbox Database
0219108796.edb' -LogFolderPath 'E:\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database 0219108796'
Elapsed Time: 00:18:11
how
to solve this problem?
Thanks,

I followed the
recommended way by Microsoft,
http://technet.microsoft.com/en-us/library/dd351168.aspx
the current state of my
C: drive has exceeded 85%.
and I will move the mailbox database
to another new Drive dedicated for database Mailbox
because the mailbox database
has a size of more than 70%.
How to resolve this problem?

In version 31.3 the arrow that let me pull down the recipient list to an email I'm composing has gone. It's impossible to check if all are listed.

It's difficult to check whether I've entered all of several intended recipients of an email I'm composing. I can scroll up and down, but I can't see the entire list to check for inclusions and duplicates. Please reinstate the pull-down arrow!

''Raggedy [[#question-1039699|said]]''
<blockquote>
It's difficult to check whether I've entered all of several intended recipients of an email I'm composing. I can scroll up and down, but I can't see the entire list to check for inclusions and duplicates. Please reinstate the pull-down arrow!
</blockquote>
''Zenos [[#answer-673279|said]]''
<blockquote>
Hover your cursor over the addresses. Hopefully a pop-up tooltip thingy will appear listing the addressees.
It's become difficult to see, but if you move the cursor about slowly in the grey area between the addresses and the message text window, you should be able to find the handle that lets you resize the addressing area and thereby see more addresses. Mine reveals its presence by changing to a slightly paler shade of grey.
I do detest the near-zero discoverability in modern GUI design. We seem to be slavishly copying of all the worst features of the Google UI. :-(
</blockquote>
Got it! Thanks so much. A little more detail for the benefit of others: you'll find the addressing area resize handle immediately above the white text area, in the narrow part of the grey area below all of the address field, subject line, scroll boxes and icons.

How to drill down the cause of "SQL*Net message from/to client"

Pretty frustrated with my tune up using suggestions from many papers for Oracle 10g R2 on AIX 5.3 L system. My users told me that the system (including Baan 5c) still responds slowly in some processes, some even worsen.
Using both queries such as
SELECT sid, schemaname, status FROM gv$session ORDER BY 2;
SELECT inst_id, seq#, event, p1, p2, p3, wait_time FROM v$session_wait_history WHERE sid=<sid from above>
INST_ID SEQ# EVENT P1 P2 P3 WAIT_TIME
1 1 SQL*Net message from client 1413697536 1 0 6419
1 2 SQL*Net message to client 1413697536 1 0 0
and others similar, I found very large numbers (almost 97%) of the sessions have events as “SQL*Net message to client” and “SQL*Net message from client” on their wait_time even the sids are in inactive status. After checking the meaning of those messages in Oracle Performance and Tuning document, the document states that mainly they are probably network problems. So How can I drill down to what status of network from my client (the users) to server by Oracle or AIX? In Baan, it has its own parameter sets in its db_resource file controlling the connectivity. In average, there are 4000 “opened cursor current”, but most of them inactives.
So my colleague asked me rollback all th changes I did on OS level such as minperm%=5
maxperm%=90
maxclient%=90,
lgpg_regions lgpg_size,
sys0 maxuproc=512,
aio0 maxservers='260'
and many ioo parameters to system defaults.
I even removed the mulitplex copy of the redo log.
I tried to proof them that there maybe the problem of the Baan/Oracle connectivity, ie due to message above,

http://docs.oracle.com ... read them for configuration information.
http://tahiti.oracle.com ... read them for recommendations.
http://otn.oracle.com ... find the best practices docs.
http://metalink.oracle.com ... look for similar issues to yours.
People that change things, on production boxes, without first determining that metrics indicate they are a good idea, and then determining their impact on a test box, should be sold to zoos as leopard food.
PS: Slowly likely has absolutely nothing to do with anything you touched. First you tune the application. Then you tune the database. Then you tune the operating system. Get out of the way and make the DBAs do their job.

Tracking down the cause of a DuplicateDeliver email (Exchange 2010 SP2 RU8)

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