Hi, 

I have problem with outlook 2010 account configured with Exchange, so in OWA it's OK all mails apperead but in outlook 

not all mails in my inbox listed !!! i recreate my account with new ost but not resovle my problem ( mailbox size: >2GB )

I think this problem it's in outlook level ! 

Thank in advanced for your support

Did you check the view on the Inbox for filters? Can you find the messing messages if you use Instant Search? 

not even I tried to find emails with searching but the same problem,
knowing that on OWA I display all ema