One of our users is having some Outlook 2007 (using Exchange 2003) issues where Outlook becomes unresponsive when it's first opened and hangs for a few minutesâ€¦ then suddenly starts working. I am seeing the following warning in event viewer: C:\Documents and Settings\Administrator\Local Settings\Application Data\Microsoft\Outlook\outlook.ost is being reconciled with the indexer for the following reason: The store was last opened on a different machine. The only change the user has made recently is archiving some folders to pst files on to the network. Any idea what this warning means or what could be causing Outlook to hang? Thanks in advance!