Vista - reading newsgroup posts offline

Hello,

I've been using Vista for a while now, but first time today I needed my
internet connection for another computer temporarily, and wanted to download
all newsgroup posts so I could read them offline in the meantime.

This used to be possible in Outlook Express -- one would choose
"Synchronize" and could even watch as posts (first all headers, then all
bodies) were being downloaded. However, now in Windows Mail it doesn't seem
to work. A post gets really downloaded only once I click on it, although I
selected "New messages (headers and bodies)" in sync settings for each group
I am subscribed to.

Could anyone tell whether this is another new "feature" (debilitation) in
new version of Windows, or I am doing something wrong?

Thanks / Regards
Tihomir