Issue description
The fax icon disappears from the home screen even without any changes. This may happen for the device that has been turned on for a longer period such as more than 30 days. In the printer Embedded Web Server (EWS), see Settings > Fax > Fax Setup > Fax Transport it is set to none and no option for analog.
When you reboot the printer, the fax icon will be visible again but this is just a work around and the issue may happen again.
Solution
To resolve this issue, make sure to update the printer firmware to the latest version. Please refer to the Firmware Update Instructions for steps in updating the printer firmware.
Explanation
This is a known issue in firmware FW7.0 and have been fixed in firmware FW7.2 or higher.
If the issue persists, search for more information related to this issue or contact support for further assistance.