Activating Payroll Modules - Historical Data for 3 companies in Sage 300 going back 12 years to current

As a system administrator, but not familiar with the app Sage 300 app.

I wish to activate the Payroll Module for three “Historical Data” companies in Sage 300. Need this in order to access payroll information from 2009-Current

Just wish to know how to do this as I never have done before. Worried about the gotchas. Thanks for any input or suggestions.