. Standard CAL is designed to help users be more productive from virtually any platformbrowseror mobile devicewith features in Exchange Server 2019 that help your users be productive no matter where they are - while helping protect your organization\'s data. To enable Standard CAL features for a userthe user must be licensed with the Standard CAL. Email calendar contacts and tasksOutlook on the web (Internet Explorer Firefox Chrome Safari and Edge support)Apps for Outlook and Outlook on the webSite mailboxesRole-based access control (RBAC) capabilities. .