On Step 1 of 7, the "Mailbox role: Client Access service," I got an error during installing:

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 8FCF29D8F3A4D8E3D649BF4231DC9B4641D5A077 because a cryptographic exception was thrown.".

I couldn't find help anywhere on this. Can someone help me? If you need any more info, please let me know ^_^

Try the solution provided in this thread:

https://social.technet.microsoft.com/Forums/exchange/en-US/e4b23442-e3c9-4611-9fde-fac848ca217b/error-could-not-grant-network-service-access-to-the-certificate-with-thumbprint?forum=exchangesvrdeploy

Try the solution provided in this thread:

https://social.technet.microsoft.com/Forums/exchange/en-US/e4b23442-e3c9-4611-9fde-fac848ca217b/error-could-not-grant-network-service-access-to-the-certificate-with-thumbprint?forum=exchangesvrdeploy

Hi,

Please try to solve this issue by the following steps:

1. Open MMC.
2. Select File, Click Add/Remove Snap In.
3. Add the Local Computer Certificate store into the console.
4. Locate the certificate for the computers DNS name (It should be in the personal store)
5. Move it into the Trusted Root Certification Authorities.

Best Regards.