If you ever need to force a bulk update from Deputy to Netsuite, you can do this easily with the Deputy Integrations Dashboard in Netsuite.
Click the Import Deputy Employees action on the Deputy Employee line and it will force a bulk update of any changes from Netsuite to Deputy.
Once it has completed, you can see the updated employee list by clicking the Deputy to Netsuite option on the Deputy Employee line of the Integrations Dashboard.