Encrypted folder

A user accidentally encrypted a folder full of photos. Now when somebody tries to access them, of course it's not working. The user is not here anymore and his account has been deleted. The folder resides on a Windows 2012 file server. When I try to remove the encryption, I get an "access denied" even though I'm the admin. Is there a way to access this pictures somehow? When I go in Advanced Attributes  > Encryption contents to secure data > Details, I see the name of the user that encrypted it but that account doesn't exist in AD anymore. It doesn't allow me to add other users either.

Thank you for your help!
Alan DalaITAsked:
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Andy SCommented:
Realistically the user account which encrypted them must be used to decrypt them.. that's kind of how that security layer works. Your best bet might be to restore the files from a backup before they were encrypted? unfortunately it's not going to be an easy thing to get around :(
There is some software which claims to be able to decrypt the files, not having personally used it I can't vouch for the quality, but it might be worth a try: https://www.elcomsoft.com/aefsdr.html
David Johnson, CD, MVPOwnerCommented:
Those files are history.. AFAIK there is no reasonable chance of decrypting them with out a Key Recovery Agent. .
"By default, the data recovery agent is defined to be the administrator account. On stand-alone workstations and workgroup machines, the administrator account is the local administrator; on domain-joined machines, the administrator account is the first domain controller’s administrator account."
Source: https://technet.microsoft.com/en-us/library/cc512680.aspx

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