Hi,
There are two ways to set working folder.
1. RMB on $/ and set working folder as C:\Working
2. Tools > Administration > Files Tab > Choose "Define" under working folder section and set "C:\Working\"
If you had tried the first one, the working folder settings will be applicable only to that system. If you need to enforce all the clients to use the same working folder, you must try the second method. Please do remember to Log Out and Log In again in all the clients to see the correct working folder settings.
Hope that helps.
Regards,
Madhan
Madhanagopal Thiruvenkatachalam
Principal Engineer
Engineering Escalation Team
Autodesk, Inc.