CIFS option -forcegroup.... in Cmode?

[ Edited ]

We are coming up on our conversion from 7mode to Cmode... and I just took the Cmode class, where the instructor told us the -forcegroup option is not available when creating CIFS shares.   Does anyone know a functional equivalent solution?   We have some users who make extensive use of -forcegroup currently and we're not sure what to tell them.