Enter a Bing Maps license key (on-premises only)
Go to the Bing Maps licensing page for details on how to get a key.
Go to Settings > Administration.
Choose System Settings.
On the General tab, scroll down to Enable Bing Maps > Please enter Bing Maps key, and enter the license key.
Choose OK.
Turn Bing Maps on or off for your organization
Go to Settings > Administration.
Choose System Settings.
On the General tab, scroll down to Enable Bing Maps > Show Bing Maps on forms, and then select Yes or No.
Choose OK.
Source: Technet Microsoft