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Outlook 2007 on EV Server - New MS hotfix available

As some of you may be aware there are some issues with using Outlook 2007 on the Enterprise Vault server. These issues often require you to make configuration changes to reduce the number of Exchange connections being made by the server (see

This issue is a result of Outlook behaviour, and not Enterprise Vault, and the required fix is a modification to how Outlook 2007 handles lots of simultaneous MAPI connections*

Well we're pleased to annnounce that MS have addressed this issue in a recent Microsoft Outlook 2007 hot fix that can be obtained using the following link:

We've tested the hotfix internally via our normal certification process and have given it the green light.

Expect updates to the TechNote and Compatibility charts soon.  Deployment Scanner will be updated in the next EV releases.


* Outlook 2007 with the hotfix applied will only allow 32 simultaneous connections whereas with the hotfix applied it will allow up to 100 (or potentially higher). When planning your deployment or moving tasks back to existing servers you should keep this in mind.


Update - Please do not install this Outlook update until further notice.  There have been multiple reports of the Enterprise Vault Exchange tasks stopping, reporting the faulting module EMSMDB32.dll:

For example


Faulting application name: JournalTask.EXE, version:, time stamp:


Faulting module name: EMSMDB32.DLL, version: 12.0.6550.5000, time stamp:


Exception code: 0xc0000005

Fault offset: 0x00051fd9

Faulting process id: 0x1c50

Faulting application start time: 0x01cbb1b23e524491

Faulting application path: C:\Program Files (x86)\Enterprise


Faulting module path: C:\Program Files (x86)\Microsoft


Report Id: a0c9ffc7-1da5-11e0-bb2a-0013724dd010


If you are seeing these issues you will need to uninstall the update KB2458611.  This blog will be updated when a fix is available.

Hello Alex,

We've installed the hotfix on Mailbox-archiving servers, no problems sofar.

W2008R2, EV8.0SP4, Exchange 2007SP2, SQL2005SP3

Hope this helps in troubleshooting the issue. Do you have any reports from mailbox-archiving failing?


Hello Alex,

I  installed the hotfix on Mailbox-archiving servers because I have performance issue  when I archive  Exchange 2010

W2008R2, EV9.0SP1, Exchange 2010SP1, SQL2008R2

but Archive Exchange 2010 with outlook 2007 still working slowly


Thanks Ronen


I have installed on Mailbox server. I am getting same error for archivetask.exe. I have dump logs.




Log Name:      Application

Source:        Application Error

Date:          12/29/2010 9:47:21 AM

Event ID:      1000

Task Category: (100)

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      xxxx


Faulting application name: ArchiveTask.EXE, version:, time stamp: 0x4c5c5e16

Faulting module name: EMSMDB32.DLL, version: 12.0.6550.5000, time stamp: 0x4ce820dd

Exception code: 0xc0000005

Fault offset: 0x00051fd9

Faulting process id: 0x1af4

Faulting application start time: 0x01cba72c257991aa

Faulting application path: C:\Program Files (x86)\Enterprise Vault\ArchiveTask.EXE

Faulting module path: C:\Program Files (x86)\Microsoft Office\Office12\EMSMDB32.DLL

Report Id: dd615c99-131f-11e0-938a-005056a71bc2

Event Xml:

<Event xmlns="">


    <Provider Name="Application Error" />

    <EventID Qualifiers="0">1000</EventID>




    <TimeCreated SystemTime="2010-12-29T07:47:21.000000000Z" />




    <Security />













    <Data>C:\Program Files (x86)\Enterprise Vault\ArchiveTask.EXE</Data>

    <Data>C:\Program Files (x86)\Microsoft Office\Office12\EMSMDB32.DLL</Data>




Here is a follow-up Thread regarding the new hotfix:

I think this blog also will be updated after the QA has finished his research.


Good news, the Feburary Outlook 2007 hotfix recently released by Microsoft does finally resolve this issue. We have finished QA'ing the fix and are happy to announce that it is ready for production use.

For those that don't have it, the hotfix package can be accessed here:



Thanks for the update.

Just to be on the safe side: Is the original hotfix (KB2458611) AND the new hotfix (KB2475891) neccessary or is it sufficient to install the new one?

Just asking because the first broken hotfix explicitly mentioned that the number of mapi profiles was raised from 32 to 100 and the new one does not have any information like this in the description.

Defandable and

Outlook Helpline Contact Number 1-888-828-9857

perfactly solve your outlook problem that phone .