Sometimes this is a result of Outlook not closing cleanly. Some common reasons why Outlook will not shut down completely when you click either the X or Exit:
1. PDA synchronization software with your PDA in the cradle.
2. WinFax Pro (especially 10.02 in Outlook 2003) - contact their support for an alleged fix.
3. Franklin-Covey Plan Plus!
4. COM Add-ins.
5. Mail reminder add-ins that keep a stub of Outlook open in the background to check for new mail and fire reminders.
6. Anti-virus/firewall programs that are set to scan incoming and outgoing mail.

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Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
Milly,
Thanks for your help but that did not resolve my issue. I'm running office
2007 on vista. PDA was not connected. I don't use franklin-Covey. No com add
ins that I'm aware of. Don't think I have any mail reminder add ins and I
tried disabling my mail scanning in Norton 360, but still had the isseu. Any
other ideas?
John
> Sometimes this is a result of Outlook not closing cleanly. Some common
> reasons why Outlook will not shut down completely when you click either
[quoted text clipped - 26 lines]
> I am closing out of outlook properly and not receiving any messages when
> logging off. What do I need to do to resolve this issue.
Milly,
Those are the the canned sources of the problem if Outlook itself was not
the issue. But in my case, and I suspect this one also, the failure to
shutdown properly is related to Outlook 2007 having process handling
problems, it gets locked up on threads it creates, in my case for
send/receive. When you exit Outlook, you have to go to task manager and make
sure that the process actually fully shutsdown. If it does, you come out of
the exit clean.
I get these problems if I let Outlook remain open over night, if I hibernate
the operating system, or if a problem with my internet connection creates a
temporary loss of contact with the hosting mail servers when Outlook is
trying to connect.
From the small number of threads in this discussion group on just one page,
I suspect this is actually a big bug in Outlook so I hope you MVPs are going
beyond defending the product with all the chaffe of other products causing
the problem and getting MS to look into this more seriously. Since the
problem is not reproducible on demand, but is frequent (averaging once or
more every day) so action plan to discover the true source of the problem is
possible and reasonable for the users to expect MS to do something about this.
Rob
> Sometimes this is a result of Outlook not closing cleanly. Some common
> reasons why Outlook will not shut down completely when you click either
[quoted text clipped - 26 lines]
> I am closing out of outlook properly and not receiving any messages when
> logging off. What do I need to do to resolve this issue.
Milly Staples [MVP - Outlook] - 08 Jul 2007 17:46 GMT
As I indicated in my post, this is certainly the result of Outlook not closing cleanly. Was this not the first thing I said?
As for MVPs pushing Microsoft to fix things, when you admit yourself that you cannot consistently reproduce the problem, what do you think the MVPs can do to push a fix for a moving target issue?
You yourself have provided answers to some of the problems, none of which are directly related to Outlook - the OS hibernating, Internet connection issues, etc.
If you really expect a faster fix from Microsoft, then you need to open a support incident directly with Product Support Services. As I understand it, you get 90 days free support from the first report of a support issue. And, even after that time, if MS PSS discovers that it IS a bug in the product, you are not charged for the incident report.

Signature
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
Milly,
Those are the the canned sources of the problem if Outlook itself was not
the issue. But in my case, and I suspect this one also, the failure to
shutdown properly is related to Outlook 2007 having process handling
problems, it gets locked up on threads it creates, in my case for
send/receive. When you exit Outlook, you have to go to task manager and make
sure that the process actually fully shutsdown. If it does, you come out of
the exit clean.
I get these problems if I let Outlook remain open over night, if I hibernate
the operating system, or if a problem with my internet connection creates a
temporary loss of contact with the hosting mail servers when Outlook is
trying to connect.
From the small number of threads in this discussion group on just one page,
I suspect this is actually a big bug in Outlook so I hope you MVPs are going
beyond defending the product with all the chaffe of other products causing
the problem and getting MS to look into this more seriously. Since the
problem is not reproducible on demand, but is frequent (averaging once or
more every day) so action plan to discover the true source of the problem is
possible and reasonable for the users to expect MS to do something about this.
Rob
"Milly Staples [MVP - Outlook]" wrote:
> Sometimes this is a result of Outlook not closing cleanly. Some common
> reasons why Outlook will not shut down completely when you click either
[quoted text clipped - 26 lines]
> I am closing out of outlook properly and not receiving any messages when
> logging off. What do I need to do to resolve this issue.
Russ Valentine [MVP-Outlook] - 08 Jul 2007 21:09 GMT
There are countless reasons this error might occur. It is naive to think it
is simply a "big bug in Outlook." Only you have the information one would
need to figure out why Outlook is not exiting cleanly in your particular
setting. We can only tell you where to look. If you are connected to a
hosted Exchange Service over the Internet, then the answer should be
obvious. You also need to factor in the Indexing Service provided with
Outlook 2007 and examine its status while you do your troubleshooting.

Signature
Russ Valentine
[MVP-Outlook]
> Milly,
>
[quoted text clipped - 60 lines]
>> I am closing out of outlook properly and not receiving any messages when
>> logging off. What do I need to do to resolve this issue.
This is clearly an Outlook problem. Like an earlier author, I hope MS doesn't try to fob it off on everyone else - as it seems they are wont to do.
I have PRECISELY the same setup I had with Office 2003; the second I installed 2007, I started getting the message.
I have scanned and rescanned all pst files. They are fine. I have also made sure Outlook has shut down. However, as someone noted, that doesn't mean that there are no remnants open with are causing the problem.
The problem is too pervasive for too many people to ignore this further. For it seems it will eventually create problems with the PST files if the system is not fully exiting Outlook before shutting down.
Hugh
Roady [MVP] - 18 Jul 2007 14:38 GMT
>>>This is clearly an Outlook problem.
Nope, the root cause is not Outlook but another add-in or program not
releasing its lock on Outlook (and thus the pst-file).
Considering the fact that you upgraded from a previous version of Outlook it
could be that one of your add-ins is not fully Outlook 2007 compatible.
Disable or update that add-in and try again.

Signature
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
-----
> This is clearly an Outlook problem. Like an earlier author, I hope MS
> doesn't try to fob it off on everyone else - as it seems they are wont to
[quoted text clipped - 12 lines]
>
> Hugh
Hugh LaFollette - 18 Jul 2007 18:17 GMT
All the add-ins are updated, and come from reliable sources (who admit their problems when they are theirs -- how quaint!).
This problem is not unique to me. I find it spattered all over the web.
Hugh