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What are the contents of "extended properties" when exporting a certificate in Windows IIS?

When you go to export a certificate in IIS, the wizard has a checkbox for exporting "extended properties". I can't find anywhere what this is referring to and whether I should check it or not.
1 Solution
Gary DavisDir Internet SvcsCommented:
Extended Properties has to do with an exported certificate that contains your private key.

From http://stackoverflow.com/questions/3625624/inserting-certificate-with-privatekey-in-root-localmachine-certificate-store-f :

To be able to save information about the key container in the certificate store Microsoft introduced so named Certificate Extended Properties.

Gary Davis
MrVaultAuthor Commented:
Your article linked to here:


which then linked to here which contains all the properties:


So can you explain a scenario where I would have important data in those extended properties and thus would want to export them when creating a PFX file?

Sorry, I'm kinda new to all this certificate talk. I just knew I needed an SSL cert for encrypting our websites and one that customers' browsers would know and trust. I just followed the wizard the cert provider told me to but they didn't address whether I should or should export the extended properties.
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