Ok, in the meanwhile I have tried the /resetnavpane commandswitch. It
did the job, great! Thanks.

So the only problem left is that I need to see all my contact items in
one single list (even if they are in separate folders). If anybody
knows a trick and could jump in, I would be really thankful.

Cheers,
Amaury

I have organized my contacts into several folders. But sometimes,
I would wish to see all my contacts in one list. I know that there is
the field "All contact items", but it only allows you to search for
specific contacts and display them in one list. But I would like to
show all my contacts in a list. I have tried to enter a whitespace or
nothing in the search field in order to achieve this, but it does not
work. Is there another possibilty.