If for example you wanted to make all clients inactive who haven't made a purchase in a year.
To do this go to Menu - Marketing - Mailshot,
Data set - all clients
Sales filters - last purchase was
Appointment filters - Client with no future appointments.
Final actions - modify client
Once completed your result in the middle section should look like this.
Now to deactivate clients who havent visited in one year, Change the Who's Last Visit Was from 3 months to a Year.
In the Adjust Clients State Change the Active State option from ignore to Make Non-Active.
By pressing Go on the bottom right hand side, Swift will now change the selected clients to Non-Active.