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Outlook 2007 Running extremely slow on certain users' PC's

Posted on 2009-07-06
Medium Priority
Last Modified: 2012-05-07

We are running Exchange 2000 on a Windows 2000 Std server at present - due to upgrade to Win 2k3/2k8 and Exchange 2007 in the next 6-9 months.

In general, Outlook 2007 works well on our users' PCs (around 30 users in total). However, some users have complaints of Outlook running very slowly.

Symptoms of the problem are:

Taking 20 seconds to move between messages (including a 'not responding' screen)
Delayed response when typing or sending an e-mail
Taking 1 minute or longer to open attachments

This is happening on an almost daily basis, and after many hours of searching online I cannot find any causes. I've tried switching all add-ons off, reducing the size of the users' mailbox, etc.

The only 'temporary' fix is to switch Outlook into 'Safe mode' when it runs perfectly (although the reading pane sometimes switches itself off). Obviously, this is not an ideal fix as it does not store the users' settings and involves holding CTRL down every time I want to launch it in safe mode.

The only pattern I have noticed is that it only seems to be affecting the last 2-3 users who log on in the morning. In general, most people are in the office by 8-8:30am. If anyone logs in around 9am, they seems to be affected. I've looked in the exchange event viewer and cannot see any corresponding errors/warnings.

Has anyone else come across this issue before?

Does anyone know what would cause such an error and what can be done to resolve the issue??

Since starting here 18 months ago, this is the only recurring problem which seems to be affecting users and it's starting to frustrate me as in general I have quite a high 'first time fix' rate, but this one issue is really annoying to say the least!

Any comments are greatly appreciated.

Thanks in advance!
Question by:robsamuel2k8
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LVL 40

Expert Comment

ID: 24783727
Could you please paste the outlook connection status from user PC?
Also check if there any AV schedule scan running on user PC at that time.  If possible disable the AV and check the performance.

Author Comment

ID: 24783945
No problem at all, the 2 users affected today are logged on and working in safe mode so I can't really disrupt them today.

If/when it happens tomorrow morning, I'll take a screenshot of the connection status screen and paste it on here.

Thanks for the comment, and hopefully that dialog box can narrow the problem down.

LVL 40

Expert Comment

ID: 24784073
One more this to check:
In some cases some background processes may cause this issue, so next time when you have the issue, check the processes which are running at that client PC and their memory and CPU utilization. This will help you to identify the troubling process.
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LVL 40

Expert Comment

ID: 24784087
Also Turn off outlook  add-ins sand third-party programs which is integrated to outlook and try to reproduce the issue.

Author Comment

ID: 24785218
I've turned off all add-ons on all PCs and turned off any startup scans initiated by Symantec. The next step I think is to check the connection status and take a screenshot next time it plays up. I assume from there I'd see any failures or delays?

Author Comment

ID: 24792347
Typical, we haven't seen the issue this morning. But just out of interest, what should I be looking for in the 'connection status' screen - connection failures, or something else?

LVL 40

Accepted Solution

Subsun earned 1500 total points
ID: 24792393
All connection status should be Established and you should check the Req/Fail & Avg Resp tab for all connections and see if the there any failure & see if the response if very high. You may compare the results with the working one to get an idea.
High Avg Resp and Fail indicates an issue with network or a busy server.

Note: If the users are running in safe mode without any issue most probably it is related to some add-in or a third-party integration. Sometimes using MS Word as the editor will cause some slowness. If the problem recurs try to do detect and repair for outlook which will resolve majority issues.

Author Comment

ID: 24793692
Hi Subsun,

I'll try detect and repair on Thursday morning on 2 of the PCs which regularly get problems with Outlook. From there, I will check the connection status if the problem persists.

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