>Can you show me where is the option in the HP LaserJet 500 MFP M525?
It is under FAX reports & Fax call report in the User Guide:
http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c02995041-3.pdf
Or possibly on: Configure default options for fax send jobs
Notification
Or possibly using the EWS:
Table 9-5 HP Embedded Web Server Fax tab