What causes outlook 2007 to configure for first time use?

[will~]

Server 2003, Exchange 2003, Outlook 2007

A user have reported that upon opening outlook (on WinXP laptop, with cached
exchange mode enabled), it shows dialog box ... configure for first time use,
and then their whole mailbox are downloaded, similar to when outlook was
setup the first time. (But it was already configured and user have been
using it for many months).

This has since happened twice with the same user. What could have caused
this? User uses a networked PC (Win XP) in the office, and connect to
network via VPN with laptop (Vista Business). Recently, the IP address for
the exchange server has changed, could this have caused outlook to configure
for first time use again?

Another user has also reported this happened on her laptop (but this was
before the IP address change). Please could you advice me where to look for
the cause?

Many thanks in advance,

 

[neo [mvp outlook]]

Does your site use anything that may re-create the Outlook profile?

Is your site using roaming profiles?

 

[will~]

Yes, the site uses roaming profile but for this particular user's account,
roaming profile the has been removed. (i.e. In Active Directory, Properties
of this user, in Profile tab, everything has been removed).

Outlook was setup for this user/laptop for many months, and the user
actively using this without any isssues until recently. After changing the
IP address to the Exchange server in the VPN connection client software.

Could changing settings in the Mobile Services (Global Settings in Exchange
System Manager) causes this problem?

 

[neo [mvp outlook]]

I don't believe so or better stated, I have never seen changes in ESM
account for an end users OST rebuild. The only time I have seen it is when
it comes to profile generators, patches that cause some internal routine to
rebuild mail profile, or roaming profiles cause the OST file to get rebuilt.

Long shot is where your antivirus software could be deleting the OST, but I
haven't seen anything like that since my OL98/2000 days.