If the name of a computer was changed, the Recovery Password must be searched for in the domain using the first eight characters of the Password ID.
To find a recovery password by using a password ID:
Launch the Delegation and Configuration console, and expand the tree view structure.
In the Account and Resource Management node, navigate to All My Managed Objects, right-click on the Managed Domain, and then click Find BitLocker Recovery Password.
To find the first eight characters of the recovery password, see Viewing and Copying a BitLocker Recovery Password.
In the Find BitLocker Recovery Password page, paste the copied characters in the search field, and then click Search.