since replaced the old file server with the new PowerEdge file server which has Suse Linux installed. 90% users can not use their network drive, yes we tried disconnect/reconnect/reboot the computer but the network driver still couldn't be mount.  the drive can be mounted by choosing the "connect using a different user name" , but after the computer reboot, the network driver remain inaccessible.
i asked other plant IT if they could help but they too don't have a better solution. googled the internet, i found some one modifiing the registry key, or by runing following command:

Control keymgr.dll
or
Control Userpasswords
or
rundll32.exe keymgr.dll, KRShowKeyMgr

these command brought the same GUI window "Stored User Names and Passwords"

by removing the server name from the list which we need reconfig the network drive, then remap the network drive, about 90% problems can be fixed.

but on some user computers that also has stored the username andpassword to the network drive, there is no server listed on the windows while runing the Control keymgr.dll.  these computer still got problem.