I am running GW 2012 SP1 client, but this issue was also in GW8.
I have a user that has over 105,000 sent messages, since 2004.
If I go into the users Sent Items folder it will only show about 37,000
sent messages (oldest sent messages to about year 2008), but does not
show any new sent messages.
I have set the Sent Items folder to the defaults display properties and
that did not work.

Now if I set the Sent Items folder Date sort order from oldest to
newest (newest items at the bottom), then I can see ALL 105,000 sent
But if I set the Date sort oder from newest to oldest, it only shows
the oldest messages up to about 37,000 messages.

Is there a reason why this is happening?
Does GW have a limit on what it can show?

Thank you for your help in advance.