Time Slice Information of data exchange for service provider

Hi Folks,

I have a requirement where-in the service provider can receive message electronically and at times they can say they do not want to receive mesaages electronically.

Can we store the time slice information of service provider receving electronic message and when it is not receiving?

Is there any way in the data exchange definition where we can have this set-up being made.

I checked for due date option but it does not show timeslice information.

Thanks,

Imran