Some customers have asked for help on the subject so we thought we should post an official "How To"....
To open Bing Maps you need to set Bing license key through any one of following approaches:
1. Use the Registry key variable "SOFTWARE\MapInfo\MapXtreme\9.0.0\TileServerKey". Where 9.0.0 is MapXtreme version.
2. Use the system environment variable MI_TILE_SERVER_KEY.
If you are running 32 bit then set key of 32 bit key of bing
If you are running 64 bit then set key of 64 bit key of bing