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Editorial Team
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Asked: 2026-06-08T02:35:13+00:00

We use IIS 6.0 (Win2003 SP2) at work and needed to renew our SSL

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We use IIS 6.0 (Win2003 SP2) at work and needed to renew our SSL certificate.
I created a certificate request by using openssl. Therefor I’d created a 2048 bit key with openssl first. I did not use that certreq.txt request file, since that produced format errors at the website of our used CA.
That request has been accepted meanwhile and I got a .pem file from our organization’s CA. So far so good. I even was able to import the certificate. But unfortunately the private key is missing now. I think, windows (or IIS) just doesn’t know, where to look for it. The private key of course lives in a *.key file, that I used for creating the request.

But how may I integrate the key into the certificate or make Windows/IIS using it?

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1 Answer

  1. Editorial Team

    You should be able to build a PKCS#12 file using OpenSSL using:

    openssl pkcs12 -export -in cert.pem -inkey file.key -out cert.p12

    Then, using the .p12 file, import both the cert and its private key at the same time.

    More info on openssl https://www.openssl.org/docs/apps/pkcs12.html

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