One or more users are unable to access the email quarantine to retrieve quarantine messages.
Email Security.cloud
This could be either due to:
Email quarantine users should use the Symantec Email Quarantine URL based on the company's geographical location.
Quarantine administrator can force an individual or all user to change their password, this would generate an email to the user with the correct Quarantine portal URL.
To force Email Quarantine password reset
A quarantine administrator can also make sure that the user is accessing the correct URL, below are the current email quarantine portal links based on the different regions: