Assign a private key to a new certificate after deleting the original certificate in IIS
This article describes how to recover a private key after you use the Certificates Microsoft Management Console (MMC) snap-in to delete the original certificate in Internet Information Services (IIS).
Original product version: Internet Information Services
Original KB number: 889651
You delete the original certificate from the personal folder in the local computer's certificate store. This article assumes that you have the matching certificate file backed up as a PKCS#7 file, a .cer file, or a .crt file. When you delete a certificate on a computer that's running IIS, the private key isn't deleted.
Assign the existing private key to a new certificate
To assign the existing private key to a new certificate, you must use the Windows Server version of Certutil.exe. To do it, follow these steps:
Sign in to the computer that issued the certificate request by using an account that has administrative permissions.
Select Start, select Run, type mmc, and then select OK.
On the File menu, select Add/Remove Snap-in.
In the Add/Remove Snap-in dialog box, select Add.
Select Certificates, and then select Add.
In the Certificates snap-in dialog box, select Computer account, and then select Next.
In the Select Computer dialog box, select Local computer: (the computer this console is running on), and then select Finish.
Select Close, and then select OK.
In the Certificates snap-in, expand Certificates, right-click the Personal folder, point to All Tasks, and then select Import.
On the Welcome to the Certificate Import Wizard page, select Next.
On the File to Import page, select Browse.
In the Open dialog box, select the new certificate, select Open, and then select Next.
On the Certificate Store page, select Place all certificates in the following store, and then select Browse.
In the Select Certificate Store dialog box, select Personal, select OK, select Next, and then select Finish.
In the Certificates snap-in, double-click the imported certificate that is in the Personal folder.
In the Certificate dialog box, select the Details tab.
Select Serial Number in the Field column of the Details tab, highlight the serial number, and then write down the serial number.
Select Start, select Run, type cmd, and then select OK.
At the command prompt, type the following command:
certutil -repairstore my "SerialNumber"
SerialNumber is the serial number that you wrote down in step 17.
In the Certificates snap-in, right-click Certificates, and then select Refresh.
The certificate now has an associated private key.
You can now use the IIS MMC to assign the recovered keyset (certificate) to the web site that you want.