install of exchange server 2013 fails

I'm having trouble installing Exchange server 2013 on a server 2012.
Followed instructions on the internet and other available information, but I keep getting the following error.
Error:
The following error was generated when "$error.Clear();
          Install-ExchangeCertificate -WebSiteName "Exchange Back End" -services "IIS, POP, IMAP" -DomainController $RoleDomainController -InstallInTrustedRootCAIfSelfSigned $true
          if ($RoleIsDatacenter -ne $true -And $RoleIsPartnerHosted -ne $true)
          {
            Install-AuthCertificate -DomainController $RoleDomainController
          }
        " was run: "Could not grant Network Service access to the certificate with thumbprint 4F356FE4927AE18DF0765E1F2A94C5CECA1440CF because a cryptographic exception was thrown."

I hope someone can help me out here.
Thanks in advance
joostsooAsked:
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
Hey,

Have you seen this article?

https://exchlabs.wordpress.com/2014/08/10/certificate-error-installing-exchange-2013-cas-role-2/

This guy is claiming that once you remove the certificate this issue can go away, he is mentioning a bug in a image for exchange media from MS.
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Kash2nd Line EngineerCommented:
try backing up the certificate.
Remove it
re-run the installation and see if it completes
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
Kash,

That is exactly what the link above states to do :).

M
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Kash2nd Line EngineerCommented:
there is a 10 second gap between you and me posting it so for sure I have not copied the contents from your link Mark ;)
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joostsooAuthor Commented:
Hello Kash, Mark Bill
Thanks for your response.
I had seen that site and tried that.
For me it did not work.Screenshot of my certificatMore suggestions?
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HariomExchange ExpertsCommented:
Please refer following article :-

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28342650.html

By changing the ownership of the Certificates private keys to myself and granting Network Service Full Control the installation continued.

I did this through the Certificates MMC snap-in and click Manage Private Keys... in the All Tasks sub-menu of the certificate. Thanks for the help @spec01!
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