I found the answer for someone that might be interested. The user was a local admin and lowering the permission to power user helped to fix the problem > Hello everybody > > I am having strange issues which appreciate to get any help on it. Users > my document is located on a file server and everyone has full permission > to his/her own document folder. When they access the document folder > manually, everything is fine. But when they try to attach a file from > outlook to a mail, they get an access is denied message although if they > manually browse to folder, they will get it. Any idea? This is very > inconvenience and help is greatly appreciated > > Outlook 2003 on xp sp2 accessing exchange 2003 sp1 on 2003 server > > Attention: > This message, including any attachment(s), is intended only for the use = > of the individual(s) to which it is addressed and may contain = > information that is privileged or confidential. Any other distribution, = > copying or disclosure is strictly prohibited. If you are not the = > intended recipient or have received this message in error, please notify = > us immediately by reply e-mail and permanently delete this message = > including any attachment(s), without reading it or making a copy. > Any outgoing message has been scanned for possible harmful file(s) or = > script(s), but it is your sole responsibility to run detection tools as = > we won't guarantee the safety of message(s).