After configuring your Active Directory domain to store BitLocker and TPM Recovery Keys:
http://technet.microsoft.com/en-us/library/dd875529(WS.10).aspx
The following command can be run to configure pre Bit Locked machines to backup their recovery key to AD:
1. Open an administrative command prompt
2. manage-bde -protectors -get C: -type recoverypassword
3. manage-bde -protectors -adbackup C: -id {Insert the numerical ID here}
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