Hi Josh,
This is easy with Lenvica HRMS – Professional. Steps are below.
1. Create a new Attendance type, 'Client Visit'. You can do this using 'General – Attendance Types'
2. Now, when employees go out, you can mark the time using 'Attendance – Attendance'. See Video.
You can even pay your employees for every hour of client visit.
Hope this helps.
Biju.