Hi, I run a desktop and laptop system. Both have XP pro SP2 and Office 2003. Both are fully patched. I have tried to sync my .pst files from my desktop to my laptop. I get my emails from Yahoo via POP3 I do not want to buy syncing software. Therefore I have copied my outlook and archive .pst files on the desktop to a memory stick then pasted those copies into C:\Documents and Settings\William\Local Settings\Application Data\Microsoft\Outlook on the laptop. I tired this today for the first time and the copy went very well. I then did a send/receive to check yahoo for any new emails. Outlook set about downloading all the emails on the yahoo server again. I had thought that as the .pst files were the same ones as on the desktop this wouldn't happen. Can someone tell me what is going on and if there is a fix? many thanks Will.