An 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:
- Log in to dropbox.com.
- Click on Admin console in the left sidebar.
- Click Settings.
- Click the Security tab.
- Under Authentication, click Add to the right of X.509 certificate.
- Select your X.509 certificate from your hard drive and click Upload.
- Click Save.