Hello. I have CA on Win 2003 server standard edition. (no autoenrollment function, no custom template), instaled ad enterprise CA. I have 100 certificates issued to computers (standard "computer" template), i am using it to 802.1x. I have issued it by GPO. The certificates Validity period is 1 year. It is any way that i can renew this certificates automaticly ??, GPO, some scripst ore something else ? Thanks for help in advance.

If they are issued to computers it is possible to renew them by enabling Automatic Certificate Request option in group policies: http://technet.microsoft.com/en-us/library/cc759371(WS.10).aspxMy weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com