Hello @UDDAVOLU Kishore ,
As you are using leaflet, I assume you are calling our REST APIs for imagery. With that in mind there is a maplayer value for buildings but it only renders for specific imagery types as documented.
https://learn.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
- Buildings: Building footprints. This layer is only visible on road map imagery type. Example: mapLayer=Basemap,Buildings
Sincerely,
IoTGirl