Exporting Your Client Digital Certificate from Internet Explorer to a .CER File Format
Article Purpose: This article provides step-by-step instructions for exporting your client digital certificate from Internet Explorer in a .CER file format. This will only export your public key. If you need to export your private key as well, please refer to the article, Export Client Digital Certificate to PKCS#12/.PFX. If this is not the solution you are looking for, please search for your solution in the search bar above.
Check your certificate installation for SSL issues and vulnerabilities.