I have recently set up a Windows SBS2003 server and domain. All users were running fine. Last week a few started having to reauthenticate to the SBS server at "random" points during the day when they accessed their e-mail and/or network mapped drives. This problem has been worsening, with more and more users experiencing it each day. Now, when some log on, they can't see the network drives at all (mapping applied at logon by a group policy script), yet the mappings to the old server (Windows 2000 Server) are fine, so I know they are running the script. Once they log on (apparently not authenticating properly?), click on a network resource, they get asked to reauthenticate. Then, once they do, they can manually run this vbs drive-mapping script and everything is peachy. Any ideas?