A X.509 certificate is needed to authenticate identity and keep your data safe.
You may see the following error message if your X.509 certificate is approaching expiration or has already expired: “Could not validate SAML assertion.”
The best way to resolve this error message is to request a new certification from your identity provider and then upload it your admin console.
To upload a new X.509 certificate to your team:
- Sign in to dropbox.com.
- Click on Admin console.
- Click Settings.
- Click Single sign-on.
- Click on the link to the right of the X.509 certificate.
- Select your new certificate from your hard drive and click Open.
- Click Save.