I have not found this elsewhere so I apologize if it already exists.

This is how I created an Inventory field in the K1000 that stores the Bitlocker recovery key for each machine. 

I found that it wouldn't always upload or update AD so I rest easier knowing this information is updated on every Check in.

ShellCommandTextReturn(cmd.exe /c %windir%\sysnative\manage-bde.exe -protectors -get c:)

The result looks like this.