How to Regenerate an expired self signed certificate





    We have exchange 2007 server on which a self signed certificate was installed.

    AS self signed cerificate validity is only for one year the self signed certificate has expired now as one year has passed.

    How can i generate a new self signed certificate for my exchange  server.





    Wednesday, October 17, 2007 4:38 PM

All replies

  • You must run the Exchange cmdlet New-ExchangeCertificate




    Thursday, October 18, 2007 7:35 PM



    So after regenarating a new self signed certificate will i have to install the certificate again on all my client machines for accessing url without giving me  an  certificate error?





    Thursday, October 18, 2007 8:53 PM
  • Yes that is true


    Actually you want to install certificate services and create a root certificate that has a lifetime of minimum 5 year to 20 years (your choice) and install that certificate on your clients


    Create a certificate for your exchange server requesting the certificate from your internal certification authority and install it into your exchange server (default 2 years valid)

    Renewing the certificate does not need any change on clients as they have the root certificate that is valid for 5 to 20 years


    You can follow the procedure here:




    Thursday, October 18, 2007 9:17 PM
  • Hi Please follow the detailed instructions here:

    How to Renew Self Signed Exchange Certificate

    • Proposed as answer by A. TheOne Wednesday, July 25, 2012 2:47 PM
    Wednesday, July 25, 2012 2:47 PM