EFS recovery policy specifies the data recovery agent accounts that are used within the scope of the policy. EFS requires an Encrypted Data Recovery Agent policy before it can be used, and uses a default recovery agent account (the Administrator) if none has been chosen. In a domain, only members of the Domain Admins group can designate another account as the recovery agent account. In a small business or home environment where there are no domains, the computer's local Administrator account is the default recovery agent account. Only the Administrator account can change local recovery policy for a computer.
A recovery agent account is used to restore data for all computers covered by the policy. If a user's private key is lost, a file protected by that key can be backed up, and the backup sent by means of secure e-mail to a recovery agent administrator. The administrator restores the backup copy, opens it to read the file, copies the file in plaintext, and returns the plaintext file to the user using secure e-mail again.
As an alternative, the administrator can go to the computer that has the encrypted file, import his or her recovery agent certificate and private key, and perform the recovery there. However, this might not be safe and is not recommended because of the sensitivity of the recovery key — the administrator cannot afford to leave the recovery key on another computer.