It has nothing to do with Exchange Server as I am having the same problems
when using SMTP and POP.

"pixel" wrote:

The problem might be limited to Outlook 2007 using Exchange Server. Try to
repair the installation after installing new updates - this worked for me.

"sbowne" wrote:

I finally caught up with the other people here -- I am using Office 2007, so
I need to turn off automatic updates and do them manually with the Custom
option. That way I can see the Office updates and refuse them. I don't see
any way to automatically put in Windows updates but not Office updates.

"Andrew Wiseman" wrote:


"sbowne" wrote in message
...
I had a similar problem. After putting on the security updates last night,
Outlook 2007 Beta would not open correctly, showing this error: "Either
there
is no default mail client or the current mail client cannot fulfill the
messaging request. Please run Microsoft Office Outlook and set it as the
default mail client."

I got the same message as Outlook tried to open. Then once the window had
opened, I got "The file ExSec32.dll is incompatible with Microsoft Office
Outlook. Install Outlook again." Windows then requests an error report is
sent to Microsoft and closes the application. :-(