# Use certificate on another server **URL:** \ **Category:** Help\ **Created:** [July 29, 2019, 3:39pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735 "2019-07-29T15:39:57Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![kleber07](https://avatars.discourse-cdn.com/v4/letter/k/7bcc69/32.png) [@kleber07](https://community.letsencrypt.org/u/kleber07)\ **Post date:** [July 29, 2019, 3:39pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735/1 "2019-07-29T15:39:57Z")
Hello. Can I use a certificate that was generated on a server? Explaining better: I have an environment like deiba my DNS server and my web servers on Windows and Linux. I created a Wildcard certificate on my Windows WEB server (\* .mycompany.net.br). And all applications on this server use a subdomain with this certificate. So far so good. Now, I must use this certificate in an application that is on a Linux WEB server. This applies to a subdomain (web2.mycompany.net.br). Why am I going to need the .crt or pem file and the key. But I don’t know where to find it. ---
**Author:** ![JuergenAuer](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/juergenauer/32/26491_2.png) [@JuergenAuer](https://community.letsencrypt.org/u/JuergenAuer)\ **Post date:** [July 29, 2019, 3:47pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735/2 "2019-07-29T15:47:59Z")
Hi @kleber07 > [@kleber07](#): > > I created a Wildcard certificate on my Windows WEB server (\* .mycompany.net.br). which Letsencrypt client did you used? Letsencrypt sends the certificate in the PEM format, so that client may have saved the certificate and converted it in a pfx or another format. Then you can reuse the certificate. But: You can create 5 identical certificates per week with the same set of domain names. So it's possible you create a new certificate in your Linux environment. If you don't have a lot of errors, the rate limit shouldn't be a problem. ---
**Author:** ![kleber07](https://avatars.discourse-cdn.com/v4/letter/k/7bcc69/32.png) [@kleber07](https://community.letsencrypt.org/u/kleber07)\ **Post date:** [July 29, 2019, 4:53pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735/3 "2019-07-29T16:53:39Z")
> [@JuergenAuer](#): > > which Letsencrypt client did you used? Letsencrypt sends the certificate in the PEM format, so that client may have saved the certificate and converted it in a pfx or another format. > > Then you can reuse the certificate. > > But: You can create 5 identical certificates per week with the same set of domain names. > > So it’s possible you create a new certificate in your Linux environment. If you don’t have a lot of errors, the rate limit shouldn’t be a problem. I used this client on IIS: > **[Certify The Web - ACME for Windows, simple free certificates for IIS and...](https://certifytheweb.com/)** > > Certify The Web provides a simple way to use Let's Encrypt and other ACME CAs on Windows and IIS, with an easy to use UI. Advanced users can use powerful Deployment Tasks and custom scripting for more complex automation scenarios. ---
**Author:** ![kleber07](https://avatars.discourse-cdn.com/v4/letter/k/7bcc69/32.png) [@kleber07](https://community.letsencrypt.org/u/kleber07)\ **Post date:** [July 29, 2019, 8:07pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735/4 "2019-07-29T20:07:23Z")
Solved! Tutorial to extract pfx certificate: > **[Extracting private key from an installed certificate](https://community.certifytheweb.com/t/extracting-private-key-from-an-installed-certificate/485)** > > Is it possible to extract a private key from an installed certificate into a .pem or .bin format? If yes, could someone guide me? Thanks I did the procedure with the PFX file that is in this folder: C: \ ProgramData \ Certify \ certes \ assets \ pfx I followed this tutorial to import into Apache and it worked out. [https://www.godaddy.com/help/installation-manual-of-certified-ssl-no-server-apache-ubuntu-32078](https://www.godaddy.com/help/installation-manual-of-certified-ssl-no-server-apache-ubuntu-32078) Thank you so much, Schoen. ---
**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\ **Post date:** [August 28, 2019, 8:07pm UTC](https://community.letsencrypt.org/t/use-certificate-on-another-server/98735/5 "2019-08-28T20:07:25Z")
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