Hi, we have Exchange 2007, currently I am planning to migrate it to exchange 2013, when I try to install exchange 2013 I got the following error, please advise.

Error:
The following error was generated when "$error.Clear();
          Install-ExchangeCertificate -services IIS -DomainController $RoleDomainController
          if ($RoleIsDatacenter -ne $true -And $RoleIsPartnerHosted -ne $true)
          {
            Install-AuthCertificate -DomainController $RoleDomainController
          }
        " was run: "System.Security.Cryptography.CryptographicException: The certificate is expired.
   at Microsoft.Exchange.Configuration.Tasks.Task.WriteError(Exception exception, ErrorCategory category, Object target, Boolean reThrow, String helpUrl)
   at Microsoft.Exchange.Configuration.Tasks.Task.WriteError(Exception exception, ErrorCategory category, Object target)
   at Microsoft.Exchange.Management.SystemConfigurationTasks.InstallExchangeCertificate.InternalProcessRecord()
   at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
   at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".

hiii,

It seems that exchange server certificate has expired , by seeing this code you can resolve it by following these links that i have given below:

https://technet.microsoft.com/en-us/library/jj984582(v=exchg.150).aspx

http://www.get-exchange.info/2012/08/14/exchange-2013-setup-error-the-certificate-is-expired/

http://social.technet.microsoft.com/wiki/contents/articles/21269.exchange-server-2013-cu1-error-was-run-the-certificate-is-expired-tr-tr.aspx

 Regards.

Few another common issues has also been listed into this informative resource. Please checkout for further investigation : http://memphistech.net/?p=264

Once Exchange 2013 has been installed successfully, you can follow the steps mentioned into this technet article for step-by-step Exchange 2007 to 2013 migration : http://blogs.technet.com/b/meamcs/archive/2013/07/25/part-1-step-by-step-exchange-2007-to-2013-migration.aspx

Moreover, while need to migrate users mailboxes, you may also consider on this automated tool (http://www.exchangemigrationtool.com/) that provides a flawless environment in order to get this job done without having downtime or any further interruption.