Microsoft Exchange 2019 Standard Device CAL Open License Client Access Licenses (CALs) serve as a safety measure to prevent unauthorized access to servers. These licenses are assigned to one person and each person on your team will need one to use Exchange. The open license nature of this device CAL means it is part of the Microsoft Volume Licensing program. The program is designed for businesses with between two and 250 that purchase licenses on an as-needed basis as opposed to buying in bulk. This version of exchange has the latest security measures in place to make communication a very safe endeavor, especially since more people are using tablets, laptops, and cell phones to send emails as opposed to exclusively sending them while working on a PC. Exchange 2019 has data loss prevention with more sensitive information types and enhanced auditing for better reporting and easier integration with third-party apps. This version of exchange has the latest security measures in place to make communication a very safe endeavor, especially since more people are using tablets, laptops, and cell phones to send emails as opposed to exclusively sending them while working on a PC. Exchange 2019 has enhanced auditing for better reporting and easier integration with third-party apps. The Mailbox server handles all activity for the active mailboxes on that server. Mailbox services include all the traditional server components found in the Exchange 2019 Mailbox server role: The Client Access protocols, Transport service, Mailbox databases, Unified Messaging.
