BinaryBoy's reply to Dave_D #892 @
You can update all groups by doing this:
Open a search session
Right-click the results list. On the Remember submenu, click Highest Scanned.
Click "Last New" in the Starting Point area and set it to 100
Set the Search String to !*
Click Auto Next
Click Refresh
The search string !* will never match anything, so it will simply scan each group and update the pointer. It downloads 100 headers instead of 1 in case there are any gaps in the subject list.