efsui.exe will not work without an EFS certificate. If missing:
cipher /k
Generates a new self-signed EFS certificate. Then efsui.exe will properly offer backup options. efsuiexe efs installdra better
The installation is not complete until it is validated. Generates a new self-signed EFS certificate
The EFS driver initializes all EFS-encrypted files’ metadata cache. To speed up: The installation is not complete until it is validated