Explanation/Reference:
Explanation:
The key archival process takes place when a certificate is issued. Therefore, a certificate template must be modified to archive keys before any certificates are issued based on this template.
See step 7 below.
To configure a certificate template for key archival and recovery
Open the Certificate Templates snap-in.

In the details pane, right-click the certificate template that you want to change, and then click Duplicate

Template.
In the Duplicate Template dialog box, click Windows Server 2003 Enterprise unless all of your

certification authorities (CAs) and client computers are running Windows Server 2008 R2, Windows Server 2008, Windows 7, or Windows Vista.
In Template, type a new template display name, and then modify any other optional properties as

needed.
On the Security tab, click Add, type the name of the users or groups you want to issue the certificates

to, and then click OK.
Under Group or user names, select the user or group names that you just added. Under

Permissions, select the Read and Enroll check boxes, and if you want to automatically issue the certificate, also select the Autoenroll check box.
On the Request Handling tab, select the Archive subject's encryption private key check box.

If users already have EFS certificates that are not configured for key archival and recovery, click the

Superseded Templates tab, click Add, and then click the name of the template that you want to replace.
Click OK.

Reference: Configure a Certificate Template for Key Archival
https://technet.microsoft.com/en-us/library/cc753826.aspx