What's an X.509 certificate?

Updated Sep 01, 2023

An X.509 certificate is needed to authenticate your identity and keep your data safe. 

It usually comes from your identity provider and can come in a variety of formats. Dropbox only accepts .pem, .cer, or .crt

The image to the right is a sample of an encoded certificate.


If your team members are seeing an error when trying to use single-sign on to log in, you may need to update your X.509 certificate. Learn how.

SSO encoded certificate image
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