Exchange Server CAL Types and Features

The illustration outlines the technical features licensed by the Exchange Server Standard CAL (Client Access License) and Enterprise CAL across Exchange Server versions 2013 throuh 2019.

The Enterprise CAL (pictured at the top of each of the diagrams) supplements the features delivered by the Standard CAL with the right to use additional capabilities, many designed to improve an organization's ability to comply with legal obligations and government regulations, including the following:

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