Using Outlook 2007 Advanced Find box, when searching in subject and message content on a mailbox in an Exchange Server 2010 SP1 containing many messages (say 25000), Outlook becomes unresponsive until the result pane is completely populated; doing the same search using Outlook 2003, it remains responsive (so the user can do other tasks while leaving the search going on in the background). Content indexing on the mailbox database is disabled (this is necessary since we need to search substrings, not only words). Is there any way to force Outlook 2007 to use the same (better) behaviour of Outlook 2003 ? Many Thanks. Giovanni Porro Dylog Italia S.p.A.