Issue: FDM registration with Shared Services fails, and the configuration log file shows this error:
com.hyperion.cis.config.CmsRegistrationUtil, ERROR, Authentication failed: com.hyperion.interop.lib.OperationFailedException: Unable to Authenticate. Unable to Authenticate
Solution: Synchronize the date and time on the FDM and the Shared Services servers.
The Shared Services registration process uses an SSO Token, which requires an accurate date-time stamp to permit authentication. For example, if the dates on the FDM and the Shared Services servers differ by a day (excluding any time zone differences), authentication fails because Shared Services rejects an outdated CSS token.