From the customer view in https://admin.webex.com, go to .
Select a location to edit.
Details of the location appear in the window.
Click Advanced Call Settings.
Click Music on Hold.
Select On Hold or Call Park for the audio to apply to.
In Music on Hold Source, choose the default music or custom music, and then click Save.
Configure Music on Hold Settings for your Location
When configuring a location in Cisco Webex Control Hub, you have the option to change settings such as the music your callers hear when they are placed on hold. You can use the default system music or customized music on hold.