Dear all, I'm using Exchange 2003 and outlook 2007, so my problem is when sending and receiving mails it goes well but if i click send and receive i found an error (0x8004010F), even though all mails sent and received successfully.So could you please advice?thanksAmr

Most likely your OAB is not being downloaded correctly, check your "Sync Issues" folder in your mailbox.If it is, close Outlook, search the C: drive for ANY files ending in .oab and delete them. Open Outlook and do a full send/receive.

There are n no. of reason to recv these errors. I would first check the below checklist and see if it resolves the issue http://msexchangeteam.com/archive/2007/04/19/437902.aspx Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi,This is the OAB issue, please try to rebuild the OAB to check this issue.For more information, check the below article:http://blogs.msdn.com/dgoldman/archive/2008/10/01/understanding-why-error-code-0x8004010f-is-thrown-when-trying-to-download-an-oab.aspxThanksAllen