How to share EFS encrypted files over a network (\\workstation\c$\encrypted-file.txt)

Hello,
we decided to theft-protect our workstations by using EFS encryption on some important documents and directories.
Just to be sure: I hope that data will not be readable in the case that someone physically gains access to the disk or computer with encrypted data and does not know user's name & password to log in or does not have the right encryption certificate with
private key. Please correct me, if I'm wrong.
All workstations are Windows 7 Professional joined to the domain controlled by Windows 2008R2 DC. We are a bit lazy, so we have generated a local, self-signed EFS certificate on a single workstation and installed this (the same) certificate on all workstations.
Now, we are able to share EFS encrypted files for example via a NTFS formatted flash drive.
Later, we have setup a Certificate authority (we can potentially issue new EFS personal, domain-based certificates that are published in AD), and established DRA as well (published DRA via a Group Policy).
All logged-in users have the same (non-domain) certificate installed in their "My User Account" certificate store, cipher /y command shows the same thumbprint value.
However, we would like to be able access files remotely, in a "lazy" way using an administrative share like
\\workstation\c$\users\bob\document.txt. We all are Domain Admins, so NTFS and SMB privileges should be OK, unencrypted files are accessible OK.
I have tried to issue a new certificates via the Cert Authority, putting them into "Trusted People" container etc., adding them to the "Users who can access this file:" list on the encrypted file and nothing worked.
So is it possible to share EFS encrypted files over a workstation's share (i.e.
\\workstation\something)?
What should I do to get it working? :-)
Thank you for any ideas.
Jan

OK, I understand that. However, I have read this article
Using Encryption File System (Technet)
and there is stated "Remote EFS operations on files stored on network file shares are possible in Windows 2000 or later domain environments only. Domain users can remotely encrypt or decrypt files,
but this capability is not enabled by default"
There are notes about computer trust etc., so I am seeking for someone who would help me a little bit with this.
Just imagine the simplest possible "single-user" case: there are two Win7 computers A, B joined into the domain and just single user BOB. Bob uses those two computers and need to access own documents like
\\A\DocumentsA or
\\B\DocumentsB. Standard setup - folder sharing: everything is working fine, share and NTFS permissions are set up, BOB can work with his own "remote" documents from both computers (\\A\DocumentsA from computer B and
vice versa).
BOB decides to encrypt his documents. So BOB logs in computer A, starts "Manage file encryption certificates Wizard", gets an EFS Certificate from CA and encrypts his c:\Documents (shared as
\\A\DocumentsA). I assume the EFS certificate is stored on computer A in BOB's local profile, therefore I ask:
Now, BOB moves to the computer B and logs on.
Q1: Will be \\A\DocumentsA accessible for BOB from B?
Q2: If not, what should do now? Should I do something in AD for computer accounts (A and/or B) ?
Thank you.

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