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Root and Intermediate Certificate installation via MMC Open up the Microsoft Management Console (MMC)Open 'Add/Remove Snap-in' Window.Add the Certificates Snap-in.Select 'Computer Account' and click 'Next'Select 'Local Computer' and click 'Finish'

To combine them, simply copy the contents inside of the root certificate and paste it into a new line at the bottom of the intermediate certificate file. Once this is done, click File -> Save As and save this new bundle file and ensure to add '. crt' without the quotes at the end of the new filename.

Import and Export Certificate - Microsoft Windows Open the MMC (Start > Run > MMC). Go to File > Add / Remove Snap In. Double Click Certificates. Select Computer Account. Select Local Computer > Finish. Click OK to exit the Snap-In window. Click + next to Certificates > Personal > Certificates.

You can create a certificate bundle by opening a plain text editor (notepad, gedit, etc) and pasting in the text of the root certificate and the text of the intermediate certificate. The order they go in depends on the type of server you are running.

Right-click on the highlighted certificate(s) and click Cut (or Copy). In the MMC Console, in the console tree, right-click on the Web Hosting folder and click Paste. The certificate(s) should now appear in the Web Hosting, Certificates folder (Web Hosting store).

To create the CA Bundle file, you'll need a text editor such as Notepad, and of course, the root and intermediate certificates as separate files....How to create the CA Bundle? Root CA Certificate AddTrustExternalCARoot.SectigoRSAAddTrustCA.SectigoRSAECCDomain/Organization/ExtendedvalidationSecureServerCA.

Step 1: Install OpenSSL.Step 2: OpenSSL encrypted data with salted password.Step 3: Create OpenSSL Root CA directory structure.Step 4: Configure openssl.Step 5: Generate Root CA Private Key.Step 6: Create your own Root CA Certificate.Step 7: Create OpenSSL Intermediate CA directory structure.