Starting from CRM 2013 Microsoft released a really great feature OOB (Out Of the Box) integration with BingMaps. Unfortunately, the list of entities that support BingMaps control is limited to Account, Contact, Lead, Quote, Order, Invoice, Competitor, and System User.So when trying to add Bing Maps to form the icon is grayed out on the insert ribbon for a form - in particular for a custom form.
To Solve this issue follow the below link:
